DIN 986 Prevailing Torque Type Hexagon Domed Cap Nuts With Non-Metallic Insert Hex Head Nut

The cap nut is a type of fasteners. And it gets its name from its shape. There is a cap shape above a hex head nut. So it is also known as hex head cap nut. Acorn nut is its common name and it is also called a crown hex nut, blind nut, cap nut or domed cap nut. It is a nut that has a domed top to cover the threads. This is to prevent contact with the external thread to protect the threads or protect other things the threads would rub against. In addition the dome gives a more finished appearance. It is usually made of brass, carbon steel, stainless steel or plastic, nylon. It can also be chrome plated and given a mirror finish.

There are two types of acorn nuts. One is low, or the standard acorn nut. The other is the high acorn nut. The high acorn nut is wider and higher and will protect extra long studs. There are also self-locking acorn nuts that have distorted threads in the hex area to create a tight friction fit to prevent the nut from vibrating loose.

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