What Is the Purpose of a Cap Nut?

A cap nut, also known as a cap nut or cap nut, is a nut with a special structure. Its appearance is similar to a cap, with a raised dome on the top and a threaded hole at the bottom. A cap nut is usually made of metal materials such as steel, stainless steel or copper. Its structural features mainly include: cap top, threaded hole, edge and bottom. A cap nut plays an important role in engineering:

■ A cap nut is combined with a stainless steel hexagonal slotted nut and uses a cotter pin, which is matched with a screw with a hole. It is suitable for environments with vibration and alternating loads, and effectively prevents the nut from loosening and falling off.

■ A cap nut with an insert, by tightening the nut, the insert taps out the internal thread to achieve an anti-loosening effect, and has good elastic properties.

■ The function of a cap nut is similar to that of a hexagonal nut. Its characteristic is that it is not easy to slip when using a wrench to clamp the nut, but it is limited to using an adjustable wrench, a fixed wrench, a combination wrench (open part) or a special square hole socket wrench for disassembly and assembly. It is mainly used on rough and simple parts.

■ Cap nuts can be used in situations where it is necessary to cover the end thread of the bolt.

■ Cap nuts can also be used to fix tooling equipment.

■ Cap nuts and ring nuts can usually be manually disassembled and assembled without the use of tools. They are often used in situations where frequent disassembly and less force are required.

■ Cap nuts are mainly used on tires and front and rear axles of vehicles such as cars, tricycles, and electric vehicles to fix tires and maintain the stability of the front, rear, left, and right positions of the vehicles. They can also be used to fix the base of street lamp stands and certain mechanical equipment exposed to harsh environments (such as sunlight and rain).

■ Cap nuts can be used in conjunction with hexagonal nuts to enhance the locking effect of hexagonal nuts. Welded nuts are suitable for welding on thin steel plates with holes and then connecting with bolts.

■ Cap nuts are suitable for a variety of fastener types, including but not limited to high-strength fasteners, mechanical fasteners, furniture fasteners, vehicle fasteners, machined special-shaped parts, cold-headed special-shaped fasteners, double-headed anchor U-shaped wires, fasteners for building decoration, etc. They can also be used in foundation engineering, automobile and motorcycle parts, light industry, machinery industry, furniture manufacturing, hardware tools, building decoration and other fields.