Knowledge

A butterfly head bolt is a special type of fastener whose head is designed in a butterfly shape and usually has a central section with a groove or bum

1. GB/T 1231-2006 "High strength Hex bolts, Hex nuts and washers" : This is the main standard of China's national standard for high stre

Stud surface treatment Stud maintenance knowledge The surface treatment of stud is mainly to improve its corrosion resistance and wear resistance, the

Heat treatment is a process that changes the physical and mechanical properties of a metal material by controlling its heating and cooling processes.

American standard hexagonal self-drilling screws (also known as hexagonal head self-tapping screws) are usually divided into coarse teeth and fine tee

When installing metal expansion screws, generally follow the following steps: 1. Select the appropriate size and type of metal expansion screws based

The explosive bolt is a unique fixture. Unlike conventional bolts, it does not have a nut part. A tiny amount of explosive is hidden in the front end

1. Bolt: composed of head and screw, with nut, can fasten two parts with through holes together, belongs to detachable connection. 2. Stud: no head, w

The main difference between the hexagon bolt and the hexagon bolt is the shape of the bolt head, the hexagon bolt head is a hexagon shape, and the hex

Ring slot rivet is a multi-functional connecting tool, which can be divided into many forms, including flat head, countersunk head, half round head an

A tubular rivet is a rod-like part of a metal product with a cap on one end. In the riveting process, the tubular rivet is inserted into the member to

Self-locking nut is a kind of nut that realizes self-locking by friction force, which is mainly used to prevent the nut from loosening due to vibratio