The self-tapping lock screw is a coarse thread common thread series, and the screw thread specification is M3～M12. The screw of the self-tapping locking screw has a thread with an arc-shaped triangular cross-section. The screw is hardened on the surface and can be screwed into a pre-made hole (made ... read more
Since self-tapping locking screws are required to have the performance of self-tapping low-carbon steel plates, they require high-hardness surfaces to achieve cutting and extrusion capabilities. At the same time, there must be sufficient heart strength and toughness to prevent distortion or twisting... read more
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
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
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