How are bolts made? What is the role of cold-forging and heat treatment?

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    Bolts are considered as the fundamental components without which engineering and construction remain incomplete. This is the major reason why fasteners manufacturers in Australia follow the advanced and high tech approach. This approach has multiple steps. So the following information is very crucial as it is based on the frequently asked questions to the fastener manufacturers.


    No matter what the size or the shape of the bolts, the basic process remains the same. Beginning by bringing the right shape to the steel wire with the cold forging process. Carried forward by the steel heating process, the strength and durability are enhanced. Then the shipment pacing is carried out. If we talk about the advanced bolt designs, the additional steps keep on getting added with the expansion of the production process.

    Do you know?

    We are one of the leading manufacturers of bolts. We have good designs for the variegated bolts. Apart from that the quality which we bring is highly promising as we are sure of your work done.

    Also, if you want one major reason for choosing us, then we never sell the catalogue parts. The things which we produce are highly customisable. Also, we make sure that we keep the exact specifications in the account.

    You just need to tell us where you are intending to use the particular fastener and based on that we shall present you with a high variety.


    Cold forging is the process that commences with the rods which are made up of large steel wire.

    Do you know?

    The steel grades have been standardised in the country as per ISO-898-1.

    Based on the special tooling, the tight shape is achieved by carrying out the cold forging process. At this point, the steel is moulded. But if we talk about the room temperature, then the series is accountable for getting killed with the highest pressure.


    The tolling can be highly complex which may contain so many different parts. Their number could reach 200. Once these are perfected, then the cold forging process is responsible for the quick production of the bolts. The large volumes and the high uniformity are what is desired after the process.


    If it is about the increased complexity in the bolt designs, then these cannot be contoured with the help of the cold forging alone. Rather some additional turning and drilling will still be required.


    By turning we mean the spinning of the bolt at high speed. But the steel will be cut away to achieve the required shape and design. The bolt will then encounter the holes which will be made by the drilling. If it is essential then the bolts could also get an addition of the washers.


    Heat treatment is nothing but the standard process which helps in making the bolts to the extreme temperatures so that the steel can get hardened.


    Much before the heat treatment gets commenced, threading is applied. There are two methods by which you can apply it. Either you can take the rolling technique into account or the cutting technique.

      • ROLLING

    Rolling is a technique that works the same as cold forging. This involves shaping the bolt by making it run through the die. Afterwards, the steel will be moulded into the threads.

      • CUTTING

    When it is about the cutting, then the threads will be formed either by cutting or removing the steel.


    As the heat treatment is responsible for changing the properties of the steel, it contributes to the easy and cost-effective application of the threading.

    Do you know?

    You will experience better fatigue performance if threading is done after the heat treatment.


    There is a high probability of experiencing minor damage and heat marks after the heat treatment. For this reason, customers usually demand the application of the threading after the heat treatment.


    This process becomes even more expensive because it needs the emergence of the hardened steel at the maintenance of the threads.


    If the length of the bolt is more than ten times more than the diameter of the bolt, only then the heat treatment can revert the steel to the round shape.


    To determine which surface treatment will be chosen, the application of the bolt and the requirement of the customer is taken into the account.


    Usually, corrosion is the main problem experienced by the fasteners, therefore zinc plating will be applied. Usually, for the application, the electrolytic treatment is taken into account.

    In this process, not is submerged in the liquid which contains zinc. Then the electric current will run over it. It helps in the formation of the zinc coating.


    As far as the electrolytic treatment is concerned, then there is an increased risk of getting encountered with hydrogen embrittlement. To get rid of that, zinc flakes are used. These are accountable for coming across with the higher corrosion resistance.


    In case, corrosion resistance is not an issue, then the use of phosphate is one of the brilliant cost-effective options. No sooner than the surface treatment is applied, the bolts in the standardised form get prepared to be packaged up. But if you are considering the advanced designs, then their assembly could take more time such as brackets. Not only this but the bolts also require patching. The patching could either be a locked patch or the liquid patch.

      • LOCK PATCH

    To improve the gripping the threads will be covered with the nylon layer.


    The thread forming torque could significantly be improved with the patching technique.


    Once all the steps are performed, then the bolt is finished. Now what remains, at last, is the quality control which helps with the uniformity and the consistency insurance. This quality control is necessary to be done before packaging.

    What is bolt preload? How bolt preload is the right choice for installation?

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    Guide on Bolt Preload

    For the building construction, there are several things that are required to keep everything in one place. From the best team of fasteners manufacturers, you can get the bolt-nut combinations. Being the best team of Fasteners Suppliers in Australia, we make sure to provide the best options of nuts and bolts.

    The nut’s threads act with the screw’s thread to apply the fasteners & they work on both ends. The resulting tension is known as bolt preload. In simple terms, it is the compression produced with nut tightening with the bolt.

    The amount of weight that can be put on the bolt, will depend on the withstanding which can come in its way. When it is tightened against the material the force is distributed and it will take the load on itself.

    Understanding the terms

    LOAD means the force level which can be put against the fastener assembly. On the other hand, PRELOAD means distributing the force throughout the assembly.

    BOLT PRELOAD means creating tension as the nut works along with the bolt and this helps to keep them together in the one place.

    Why is bolt preload important to understand?

    When you tighten the bolt it will be there in the system when the assembly would easily come apart. When it becomes tight, it will be put against the force and it will be distributed into the material. This way it will work against the load force. Bolted joints have an added strength due to the preload.

    How is the preload important?

    If there is no bolt preload, then the entire burden will be put on the bolt so that it can hold the weight. Adding the preload will greatly reduce the total number of bolts required for one place. Through the use of support, plates will help to hold in the load with ease. Although, make sure the working load is not much as compared to the bolt preload as this easy bolt and support bolt will get the right support.

    Preload is an important part

    No doubt, preload is an important part of the larger mechanical system. Its use is considered in high-performance instruments, like telescopes. With this the buckling is avoided, specifically, you want to make changes that are caused when you need to change the position.

    Get the best quality bolts and fasteners

    No matter which type of fasteners or bolts you need for the project, our team has everything you need to make it a success. Depending on your needs you can ask the team what you need. Our team has successfully delivered the best quality fasteners to many clients all across Australia and other parts of the world.

    Just reach out to our team and they will understand your requirements so that your specifications are fulfilled and this way you will get the best product. Moreover, we provide everything at an economical price. Get ANYTHING that you are looking for.

    Which factors are majorly responsible for contributing to the bolt failure?

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    The most frustrating time for the engineers is when they experience themselves depressed with the problems of the bolt failures. You will be glad to know that you can prevent this from happening by taking some precautionary measures into account beforehand. You need to consider certain factors in account, before applying pressure on the fasteners.


    The functioning of the bolted joints is accountable for strengthening and securing the connections of the bolt.

    So let us discuss the pressure applied to the bolts

    Stress on the bolts

    If you overstress the bolt, then surely you will encounter bolt failure. The service life of the bolts is hugely dependent on the factor of whether you are making the bolts to bear the right amount of loads or not.

    As far as stress is concerned, these are of the three types:

      • Internal stress:

    The internal stress is accountable for keeping the bolted joints in the proper place.

      • External stress

    When any kind of external stress is causing the bolts to get burdened, then it is termed as the external force.

      • Static Force

    When both the ends are pulled together, then it is known as static stress.

    Important Tip

    To make sure that the bolts do not cause a hindrance to your project, you need to check whether they are not overturned or tightened.

    What do we mean by bolt fatigue?

    Bolts are usually designed to stay for a long time. This means that their service life is so long that they cannot ditch in between. But if you make it get fatigued, then bolts can get tired or exhausted and thus result in failure.

    What do you mean by the BOLT CORROSION?

    Sometimes the bolts have to cope up with the difficult environmental conditions which are usually incompatible. Exposure to the following increases the risk of corrosion:

      • Naturally Blending Chemicals
      • Metal Products
      • Oxygen


    The bolts which are fitted in the automobile components are on verge of risk of getting corroded because they are exposed to the following;

      • Engine Leaks
      • Fluids

    Also know

    Corrosion can be caused in any of the bolts used in the following:

      • Structural applications
      • Mechanical applications
      • Construction applications

    What do we know about the Bolt Thread issues?

    When the bolt gets tightened, there is an emergence of the two kinds of threads. And when this happens, the threaded part of the bolt encounters some kind of stress.

    How is under designing responsible for the bolt failure?

    The bolt should be designed as per the load-bearing capacity. This can be illustrated with the help of an example:

    If the bolt is capable of bearing only 1 tonne of the force, but the faulty design has made it somehow bear the 1.5 tonnes of the force, then it is also an extremely disturbing condition for the bolts.

    Is the exposure of the hydrogen bad for the function of the bolts?

    Yes, certainly it is. The metal of the bolts gets giggly affected when it is exposed to hydrogen. It becomes brittle.

    Which measures can be taken into account to prevent the bolts from encountering failures?

      • First of all, the design of the bolt needs to be assessed.
      • Also, evaluate all the factors of the environment where the bolt is going to be used.
      • Make sure that the bolt is getting the ideal heat treatment.
      • The plating of the hydrogen ought to be designed very meticulously as it is important for avoiding the embrittlement caused by the hydrogen.
      • The choice of the right kind of thread can also save you from coming up with the issue of bolt failure.

    Why are the benefits of buying nuts and bolts from MIG Enterprises?

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    Everybody wants to get manufactured the right bolt and nut for the particular project. But without the right technology and machinery, we cannot achieve this purpose. But if you count on the MIG enterprises, then you can surely expect to get one.

    What do we offer at MIG enterprises?
    At MIG enterprises, we make use of not only the advanced sophisticated machines which can help us to provide our clients with the critical designs for the nuts and the bolts. We carry out the hot forging in big diameters when particularly the alloy and the stainless steel are concerned. We prioritize to manufacture the popular grades which may include the following:
    • 8.8
    • 10.9
    • B7
    • B8M

    What are we famous for?
    We are famous for manufacturing bigger diameter bolts that may have 1.2 metres of length. The size of the diameter bolt may vary from M-24 to M-72. For manufacturing, we make sure that the entire machining process is being done by the CNC machines. The heat treatment is then done with the help of the SQF machines. Another amazing aspect about it is the thread rolling which is done on the advanced thread rolling machines.

    What do you know about the product safety in bolts and nuts?
    The importance of product safety in the bolts and the nuts is just undeniable. We make sure that final manufacturing is done with the help of the best technology and methods.

    Where do our bolts are used?
    Our bolts have made their special place in many of the critical applications. Following are the areas in which the use of the bolts is considerable:
    • Heavy engineering industry
    • Railways
    • Solar Plants
    • Mills

    What about the performance?
    No matter how good parts you have used to come up with that one envisioned equipment. But if you have not focused on the quality of the nuts and the bolts used, then you may encounter failure in the working of the machinery since the fasteners are accountable for joining the two parts together.

    The team of MIG enterprises works tirelessly to satisfy the client with minute specifications. So if you want your specifications to be given quintessential care, then please contact us. We promise to provide you with the best and the timely services.

    So what are you waiting for? Call us right away to give us a chance to resolve your queries.

    Why are retaining rings used? What are the different categories of the same?

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    As per the fastener manufacturer, “The retaining rings are the kinds of the fasteners that are accounting for holding both the components and the assemblies.” Once these fasteners are installed, then the revealing portion will be acting like the shoulder which is particularly responsible for retaining the certain assembly or the components. These are very famous kind of retaining ring which is known as the circlips.

    What are the retaining rings made up of?

    The retaining rings are made up of the following:

    • Carbon steel
    • Stainless steel
    • Beryllium copper

    These also come in sundry finishes. As the fastening industry is growing at a rapid rate, then custom rings with different aesthetics and corrosion protection are being made to suit the environment in which they are to be installed.

    Types of Retaining Rings

    • External Bowed E rings

    The bowed e retaining rings are used to join the rotor clips and the retaining rings. These are minutely outlined with the motive that they are eventually to be installed in the groove on the shaft. When these bowed rings get snapped, they put pressure on the retained parts so that the compensation can be made for the sundry tolerances which have accumulated over some time. It is relevant to mention here that the external bowed rings are installed through radial means.

    • E style retaining rings

    The retaining rings are assembled by taking rotor clips and the retaining rings. These are considered the most popular and broadly used style of retaining rings. These are usually called the rings due to the three rings which are highly accountable for making a connection with the bottom of the groove and these are present inside the shaft. This effectively assembles the retention by catering for the shaft.

    • External shaft retaining rings

    These are nothing more than the rotor clips which are axially installed. These are specifically outlined so that these can effectively be installed into the groove or the shaft. Once the grooves get installed on a shaft, some of the portions of the rings usually stand out apart from the groove. This is carried out so that the shoulder is generated for the effective assembly.

    • Internal housing retaining rings

    These are the retaining rings that do have the same characteristics as that of the categories of the rings which are mentioned above. If these are installed in either the bore or the housing, then the fragments of these rings have the potential of standing out away from the groove so that the strong assembly is ensured.

    From where should order the fasteners?

    It is advised that you should be ordering the fasteners from MIG enterprises. This fastener making company is the one that is accountable for the high-quality fasteners along with the custom finishes. So if you want to order the fasteners, place your order right now so that timely delivery is ensured.

    What are the different types of washers which are available in the market?

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    Fasteners are available in different forms. With the fasteners manufacturer, you can find different options which are available in the market and which will be best suited. With the fasteners suppliers in Australia, you will come across different options which are made specifically as per the standards. In this blog, we are going to focus on the different types of washers.

    Types of Washers

    • Backup rivet washers

    The use of backup rivet washers helps create a large diameter which helps to hold it in place and the support is much better. Moreover, this option also helps to stop the pull-through from the rivet.

    • Belleville conical washers

    Belleville conical washers are the type that outs extra tension on the fastener to increase the assembly. The method of using it is a stack which helps in

    • Increasing the load
    • Deflection
    • Both of the above-mentioned options

    The category of these types of washers helps boost the tension and the added vibration will assist in assembly.

    • Dock washers

    Dock washers are referred to as heavy-duty washers as most of the time its use is seen in the building docks. Apart from that, it is used for heavy-duty construction when there is a need for thick washers and the inside is small.

    • Fender washers

    Fender washers are categorized as round washers and the inside of the diameter is small. It helps in stopping the pull-through and the surface will easily bear the pressure.

    • Fender washers (Extra thick)

    These have an extra thickness as compared to the above-mentioned option.

    • Finishing cup washers

    With the finishing cup washers, it goes from the cup to the head then to the fastener or screw to help to fit in. through this, the final finish is better. Their shape is like a cup.

    • Flat washers

    Flat washers come with a thin plate from the outer diameter and the hole in the centre is punched to the screw or bolt. Through these types of washers, the load is distributed with ease and the nuts & bolts will be easy to get tightened.

    • Flat washers (Extra thick)

    As compared to the flat washers these have increased thickness. The washers are present outside and the centre hole punched with the size of a screw or bolt.

    • Flat washers – 900 series

    Flat washers in the 900 series are round and thinner which makes the inside small along with the outside diameter.

    • Lock washers (Split ring)

    Lock washer’s primary reason for usage is that it stops the bolts, nuts, and screws from getting loose from their place. The washers are rings, which have a split on one end and the shape is helical.

    What are effective and simple tips for using fasteners in your project?

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    For your understanding, we have shared the tips for using the fasteners in your project.

    Tip 1: Choose the fasteners lubricant or stainless steel fasteners

    Stainless steel fasteners come with a coating that reduces the likelihood of making them oxidized. The coating can result in friction between nut & bolt during installation. During heating, the threads jam and they can weld with each other as this is known as cold welding. To reduce the risk, use fastener lubricant in a small amount as suggested by the professionals. Doing so will increase the life of the fastener.

    Tip 2: Do not let Stainless steel come in contact with saltwater

    Saltwater can result in rust which affects the longevity of fasteners. This is the reason, we suggest you choose stainless steel. It is only suggested that you opt for 316-grade stainless steel. Otherwise, the chances of rust are increased and this is the reason, stainless steel is the right choice.

    Tip 3: Always make hot-dip galvanized fasteners with other hot-dip galvanized fasteners

    Hot-dip galvanized fasteners are coated in a thick zinc protective which is referred to as hot-dip galvanization. This will reduce the problem of oxidation. The thick coating cannot be used with other materials. Fasteners which get a hot dip and the spacing will be different in terms of thickness. They are preferred to be used with one another as the compatibility problems are avoided.

    Tip 4: Choose the right size screwdriver

    The screwdriver should fit in the head, so make sure to go with the right size. When you choose the right fasteners it will go through the drive and it will not be loose. Therefore, you should choose the right sized driver, otherwise, it will strip from its place.

    Tip 5: Stainless steel and aluminum cannot be used together

    Both of these options are different from each other and to use them together you need to be specific. If these are not used correctly, the electrons will be transferred and the material quality is affected which is referred to as Galvanic corrosion.

    Tip 6: Always pre-drill hardwood before installing screws

    At times, the softer wood is there which you don’t have to include as these come with pre-drilling holes. Hardwood can easily split or crack as the screw is installed. Due to this, it affects the product finish and its integrity is also affected. So, it is better that you ore-drill, so that the entire work is not affected.

    Tip 7: Stainless Steel has a softness to it

    Stainless steel is considered soft metal and these are different options. With these hard metals, the heat will affect the properties of stainless steel. This means heat treatment.

    For more information, you should get in touch with our experts.

    Get quality custom bolts and fasteners for construction & Heavy Equipment

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    Custom Bolts & Fasteners for Heavy Equipment & Construction

    MIG Enterprises provide a high-efficiency and premium range of custom bolts and fasteners for heavy equipment and construction. Being the No. 1 fasteners manufacturer in Sydney, customers rely on us for the durable and quality product for the construction and other necessary equipment. As we have taken the responsibility of being the best Fasteners Suppliers in Australia, so our major focus is on safety and ensuring the projects complete on time or even before the due date. Here’s is the breakdown of what we offer to the customers:

    • With our team, you can get custom fasteners as per your need and specifications. The supply metric fasteners are in grades 10.9 and 12.9 from M6 to M100.

    • All your needs are kept in mind and then necessary products are supplied with premium grades. Also, the plating need is met to ensure the product does not get corrode and your investment lasts for a long time.

    Custom Bolts

    A bolt is a type of fastener that has an external male thread. It is combined with a nut which allows to put together 2 components in a place. In the future, if repair or maintenance is needed, it can be removed easily or installed again. In the industrial sector, bolts are a vital part of several fastening applications.

    MIG enterprises are giving their services to different sectors as per their need. The custom bolts are an important part of the electronics, automotive, heavy equipment, construction, transportation, marine, and many other sectors.

    Get bespoke product

    In many projects, quick assistance is needed from a bolt manufacturer. If you are in search of the same, then we are here for you. Our made-to-order bolts are perfect in every metric an inch. You can get it constructed from stainless steel, alloy steel, aluminum A286, carbon steel, and much more. Moreover, the custom-made bolts have the perfect finish and they are corrosion resistant.

    Custom fasteners

    The need for custom-made products is increasing with time. The right kind of expertise is needed to get the best product which is as per your requirement. Along with custom bolts, our team can give you custom fasteners. We have a wide variety of products which includes knobs, washers, inserts, bolts, screws, lockouts, and any other options.

    We will be there for you from prototype through inventory management. These difficult parts should be available with ease and that’s what we are here for you. Being the best fasteners companies, have helped us to give the customers with premium products and that what we aim for every project.

    Talk to the experts

    If you are in search of custom fasteners and bolts for your next project, then you don’t have to look any further. Our team is here for you to help you get the product that completes your project on time and most importantly the quality is not hampered. For more information, get in touch with our team.

    Types of screws – Wood, Machine, Lag, Sheet-Metal, Twinfast & Security

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    The most flexible solution for the joining of two or more than two parts is the use of screws. The common characteristic which can easily be found in all the screws is the surrounding of the long shaft with the threading that is particularly spiral or helix. According to the fastener manufacturers, to bring about the ultimate perfection and finish, one should make use of the right kind of screws. If the engineer is confused about which screw will fit best the requirements and specifications of his project then he need not worry because the professional assistance of the MIG Enterprises, the best fastener suppliers in Australia help those engineers to determine which screw should they be choosing.


    • Wood screws
    As the name itself suggests that wood screws are used to join the pieces of the wooden applications. One must be wondering why only this kind of screw is used for wooden projects. Then it is because of the sharp point which makes the screw able enough to pierce through the depth of the wood.

    • Machine screws
    Machine screws are particularly used in the application which is heavy-duty emphasised. From the name, we have already guessed that these kinds of screws have everything to do with the machines only. A stove Bolt is the one kind of screw that comes under the subcategory of the machine-screws.

    • Lag screws
    These screws are the ones that are coated with zinc. These are usually available in jumbo sizes. If you have heard about the coach bolts or the lag bolts, then it is relevant to mention here that these are the other names for the lag screws. Either hot-dip galvanization or electroplating is relied on for the application of the zinc as the top coated layer.

    • Sheet Metal screws
    The name implies that this kind of screw can only be used in sheet metal, but these can also be used in wooden applications. Because of the threading at the top of the shank, these are considered an ideal kind of screw for the sheet metal because of the easy digging feature.

    • Twinfast screw
    One must be wondering, in which context the name twin fast is being used. Because of its feature that includes the use of a pair of threads rather than a single one. The contribution of this feature has made the use of these screws even more advantageous since these can be driven into the material at double the speed as compared to the conventional screws. If you are also influenced by the myth that says that the twin fast screws can only be used for the drywall, then get yourself corrected at this point, because these can also be used in the applications.

    • Security Screw
    Security screws are the most needed screws because of their design. The efficient outlining does not allow provocation of any unethical act by tampering with the application or trying to remove the security application.

    If you want to place an order for any of the above-mentioned screw types, then count on us for efficient services. Our professional help is always ready to assist you in the matter.


    Get the right type of Bolts, Nuts and screws for your project or application

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    As we know there are many kinds of fasteners used in the automotive and the construction industry. Sometimes, it is needed to get custom fasteners built and this can efficiently be carried out by the fastener suppliers in Australia. For bringing about a precise finish in the application or a project, there is a need to choose the right kind of fastener. If you are finding it difficult to choose the best one for your project, you should take professional assistance from the best fastener manufacturer.

    • Types of Bolts

    • Carriage bolts

    Carriage bolts are also known as coach bolts.

    • Hex head bolts

    The following categories are available as far as the hex head bolt is concerned:

    • Hex serrated

    • Hex tap bolts

    • Hex cap screws

    The predominant feature because of which it is sold in the market is the hexagonal head which is usually a perfect fit for certain applications.

    • Machine screws (Stovers)

    Whenever any bolt or screw appears to be having a flat point, then it is a machine screw.

    • Shoulder bolts ( Stripper bolts)

    These are the bolts that are advantageous because these can either be installed through a driver or by hand.

    • Socket cap screws

    These are available in the following categories:

    • Socket cap

    • Flat socket

    • Button socket

    • Button flange socket


    There are also the following type of bolts available:

    • Socket cap screws

    • Socket Set ‘Grub’ Screws

    • Square Head bolts

    • Types of screws

    • Deck screws

    Deck screws are most-customarily used in wooden materials or furniture because of their bugling head and square drive.

    • Hex lag screws ( Lag bolts)

    These are particularly used whenever the wooden floor is being laid out. Besides, their use in heavy-duty applications is customary.

    • Self-drilling screws


    • Inclusion of the sheet metal thread

    • Self-drilling abilities

    • Piercing abilities


    • Sheet metal screws

    • Wood screws

    Types of Nuts

    • Cap nut ( Acorn nut)

    This nut is particularly used whenever there is a need to get prevented with the contact of the external thread.

    • Castle nuts (Slotted nut)

    This is used in low-torque oriented applications where there is a need to avoid loosening of certain parts.

    • Coupling nuts

    This kind of nut is used in the situation when two male threads are to be fastened.

    • T-Nuts

    These are used to join or fasten the following:

    • Wood

    • Particle

    • Composite


    • Flange Serrated Nuts

    • Hex Jam and finish nuts

    • Heavy hex or machine nuts

    • Keeps-K Lock and knurled thumb nuts

    • Nylon (Hex Jam & Insert Lock) Nuts

    • Stover and slotted hex nuts

    • Square and T-Nuts

    • Breakaway or Wingnuts

    • Types of washers

    • Backup rivet washer

    Whenever there is a requirement to prevent the pull-through of a rivet, then particularly backup rivet washers are taken into account.

    • Dock Washers

    Dock washers are used in the following:

    • Building of docks

    • Heavy-duty construction activities


    • Belleville Conical and fended washers

    • Finishing cup and flat washers

    • Lock and NAS Washers

    • Structural and square washers


    If you are interested in placing your order for any of the above-mentioned fasteners, then instantaneously consult with our professionals telephonically.