Product Introduction

　　 Hexalobular socket countersunk head tapping screws have a wide variety of threads, including self tapping threads (wide thread), machine threads (ordinary threads), dry wall screw threads, fiberboard screw threads, and some special threads. In addition, the thread of this type of screw can be divided into single-lead (single-head), double-lead (double-head), multi-lead (multi-head), and high and low-tooth double-head threads.

Product parameter

　　 Specification: 2.2-14

88彩票　　 Length: 3-180mm

88彩票　　Material: carbon steel

　　 head type: countersunk head

　　Thread type: self-tapping

　　 slot type: quincunx

　　 Tensile strength: 450Mpa

　　Surface hardness: ≥450HV

　　Core hardness: 270-390HV

　　Surface treatment: environmentally friendly blue and white zinc