We’ve designed this guide to help you understand your fastener and fixing types, materials, and applications from screws and washers to nuts, rivets and everything in between. You’ll find that nylon 6.6, a variant, is stronger still, and absorbs less moisture than standard nylon. When a high level of torque is required in your fastener, it’s the ideal material. Nylon 6.6 is popular and used to make everything from fasteners to cable ties. If you don’t want your screw heads to show, then use secure screw covers. These are available in different colors to give your application a finished look. What’s the difference between a threaded rod and threaded stud? That depends on who you talk to. In some quarters, they’re one and the same. To others, a threaded stud refers to a shorter length than a threaded rod. A stud also often has a slot in the end for installation. Polyoxymethylene (POM) is also known as acetal. It’s a highly crystalline thermoplastic favoured for its stiffness, hardness, and low creep under stress. It also provides high flexural and tensile strength, has a low coefficient of friction, excellent chemical resistance and outstanding fatigue properties. The flip side is, POM has moderate heat stability and insufficient flame resistance. While it’s the perfect material for many applications, it’s not ideal for those where heat is involved.

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The shoulder washer is also referred to as an insulation sleeve because it insulates rivets, screws or wires. A nylon shoulder washer, for instance, can be used for connections between incompatible metals. Another nylon shoulder washer is designed to reduce vibrations. A plastic shoulder washer can also be inserted into a housing, giving a rotary application a bearing surface. Another of its capabilities is that it stops heat from flowing through the screw to other parts of the assembly. Carbon steels are iron-carbon alloys containing up to 2.5% carbon. The addition of carbon adds strength to steel, though like any steel, it can still stress and break under pressure. There are different grades of strength in carbon steels. ASI 1022 carbon steel is often used in structural applications with moderate strength, such as bolts and cold formed fasteners, and recessed head screws and low-strength fasteners. A cost-effective, vibration and corrosion resistant solution for connection of thin gauge materials Acetal provides high strength and stiffness. Its good dimensional stability makes it an easy material to machine. A semi-crystalline material, acetal has good chemical resistance. It offers a low coefficient of friction and good wear. It has very low moisture absorption while resisting abrasions.

What are the different types of fasteners and their uses?

High bond tape also compensates for irregular bonded surfaces. In a perfect world, materials are flat against each other, but we all know this rarely happens. Surface textures, thermal expansion or chemical reactions can impact the bond or create gaps. High bond tape can correct these problems. Tough, strong and abrasion resistant, Nylon has a very low coefficient to friction. With good thermal and chemical resistance, it also provides resistance to tears, chemicals, and can be formulated to stand up to UV rays. Nylon’s strength means it can be used instead of more expensive and heavier low-strength metals. The heat generated by consumer electronics makes this a must-have, withstanding temperatures up to 130°C (266°F)

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as a decimal is .1875. If we multiply that by 1.5, we get .28125. So our formula now looks like this: .28125 + .113. The total is .39425 of an inch for your length. Bolts are often confused with screws, because they do similar jobs. Bolts join two unthreaded components, while screws join threaded components. Usually, the head of bolts is bigger than the shaft. While screws are most often tapered, bolts are not. A bolt needs a nut for tightening, while a screw works on its own. To figure this, you’ll need to convert .183 to 1/32s. To do that, start by taking .183 and divide by 1/32. Here’s the formula: A wing nut has tabs, or wings, on the side, enabling manual turning. This is especially useful if the wing nut has to undergo frequent removal and reinstallation. A thumb nut is also applied manually. Like the wing nut, it’s ideal if the nut needs to be removed often. However, it should never be used as structural support. It works well, for example, on panel and machinery covers. However, it’s still wise to know how to calculate the size you need. That knowledge could come in handy. With that in mind, you need to consider two points:Set by pulling the mandrel head into rivet body and expanding it to cause flare against reverse side Push-in blind rivets are so called because they can be installed even if you can’t access the rear side (“blind” side). An example is a clinch rivet. All you need to install it is a pop rivet installation tool. Another type of blind rivet is the drive rivet. The drive rivet has a short mandrel that protrudes from the head. It’s placed into the hole and a hammer is used to drive the mandrel in, flaring out inside the hole to provide a secure, load-spreading fix. Drive rivets have a specific application, used to secure panels and architectural features to masonry walls. Here’s a closer look at the different types of fasteners available, and what your choices are. Screws Cover Caps and bases can be mixed and matched in six different colours to create a customised appearance

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PEEK (polyetheretherketone) is a high-performance plastic that maintains stiffness at high temperatures. It has outstanding resistance to harsh chemicals, and excellent mechanical strength and dimensional stability. Another benefit is its resistance to steam and water. All of these reasons make it a favourite of the healthcare industry. Nuts, which have threaded holes, work in conjunction with bolts, strengthening the parts they hold together. Usually, most nuts have a hexagonal shape. This is only on the exterior, while the interior is actually cylindrical. The purpose of the hex exterior is to make installation easier. Six sides makes the hex nut easier to grip, which translates to easy installation or removal. Polycarbonate is tough and transparent. It provides high impact strength and high modulus of elasticity. Other benefits include its high heat deflection temperature and very low moisture absorption. It’s a popular material for electrical and electronic applications due to its low frequency and high-voltage insulating properties. Because of its strength and transparency, it’s also ideal for point of sale and displays. You might find it helpful to read our guide: When to use polycarbonate fasteners. Polypropylene can also stand up to UV exposure, and depending on the environment, it can be a good choice for outdoor use, especially when you consider that it doesn’t absorb or emit moisture. However, it’s not suited for freezing temperatures, as it can become brittle. For example, an acetal dowel pin is inserted into receiving holes, which hold parts of an assembly together through the use of friction. A tight fit keeps the parts firmly together in fixed alignment.Like screws, bolts come in a variety of head types, which are designed according to the tool that will engage with it for tightening. Sometimes a bolt is even called a screw. For example, a machine screw can be a type of bolt, but not always. The general rule of thumb is, if it has a hex head, it’s a bolt. If it has a slotted head, such as a Phillips or Flat head, then it’s a screw. Washers are used to distribute the load of threaded fasteners by increasing the surface area. They reduce the risk of stress-related damage to the material that the threaded fastener is driving into. Sometimes, washers can give you spacing as well, preventing your fastener from going deeper into the material than you might want.

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klein shares that this new project was inspired by wire cut EDM demonstration toys that show two pieces of metal sliding against each other and coming together so perfectly that the seam disappears. the designer took this popular, ‘satisfying’ concept and made it into something functional: a new screw that looks like a smooth disc, with no (visible) slots, as well as a screwdriver to complete the set. the newly introduced system uses stainless steel magnets, so that the driver is held in the screw without the little plunger pushing it out. Round that final figure to the nearest whole number, and we have 6. The diameter of the rivet you want is 6/32 of an inch. US-based woodmaker and youtuber andrew klein has revealed his ‘next big thing’: a screw with invisible slots that disappear completely. instead of needing to be hidden like ordinary screws, this precision-crafted innovation can be integrated into any design as a decorative accent, as the holes are only visible when the screwdriver is introduced, completely disappearing once the tool is removed. created with the purpose of aesthetics in mind, these new screws are ideal for carpenters who want an extremely clean and seamless look on their finished pieces. Panel fasteners do what the name says: they connect items to panels. They do this on the edge or through holes or slots. However, not all panel fasteners go by that name. Snap rivets are a prime example. Another solution are quarter-turn panel fasteners. These are typically used to secure a panel or cover, yet still enable easy access. Comprising of two pieces, quarter-turn fasteners join a fixed surface with a removable one. The base fits into the fixed panel, and then the slotted screw is inserted through the panel that can be removed, and into the fastener base. A quarter turn of the screw secures – or loosens – the panels. For more solutions that can fasten panels, go to rivets. You can also learn more in our Guide to panel fasteners. Rivets are manufactured by 1/32 differences, so you can’t get a rivet with a diameter of .183, unless you have it custom made.

Types of nuts and bolts

With good resistance to oils and low permeability to gases, PVC is inherently self-extinguishing. This makes it an excellent material for wire and cable insulation. Polysulfone (PSU) is a transparent material with high-impact resistance. It provides high performance, has good electrical properties and resistance to chemicals. One reason for its popularity is its outstanding hydrolytic stability against hot water and steam sterilisation. It performs especially well in high-temperature environments and resists detergents and hydrocarbon oils even in those conditions, under moderate stress levels.