Ordinary self-tapping locking screws are generally dedicated self-tapping locking screws for specific materials. For plastic parts with high hardness and brittleness, flat-tailed self-tapping locking screws or triangular tooth locking screws have been developed (referred to in the industry as BTT to... read more
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
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