1. Core hardness of self-drilling and self-tapping screws: standard value HRC28-38. The test is carried out on a section 1-2 times the nominal diameter from the tail. If the nominal length is too short, you can embed it first, and then measure the hardness. 2. Surface hardness: standard MINHV450. 3.... read more
Locking self-tapping screws are used for non-metal or soft metals, without drilling and tapping; locking self-tapping screws are pointed, so that they can be "locked and self-tapping"; ordinary screws are flat-headed and thick Consistent. Tightening the self-tapping screw means: the drilled hole is ... read more
The large-pitch self-tapping locking screw is a special fastener formed by a triangular thread. It is specially designed to fasten plastic and soft metal products. It is called "Priston thread self-tapping locking screw" abroad. Screw. The cross-section of the screw is a unique triangular isometric ... read more
In addition to the cold heading process, the manufacturing processes of high-strength anti-theft screws include warm forging, cold extrusion and cutting. The high-strength cold heading screw production process of wind power anti-theft screws is: spheroidizing annealing→cold drawing→cold heading form... read more
Fasteners, as the connection between the host and parts, are tested in various harsh service environments along with the host. They are used in high temperature, high pressure, low temperature, vibration, corrosion, heavy load, alternating stress, shear and torsion resistance Various occasions. The ... read more
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