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. Need:Easy installation in restricted space for general fixing purposes or attaching components to panels

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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.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.

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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.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.