88彩票Product Introduction

88彩票The hexalobular socket large flat head tapping screw is a self-tapping screw with a large flat head and hexalobular socket type. Its early design is a threaded forming screw made of hardened steel and the end is type A. It is mostly used to connect the sheet metal of heating and ventilation systems, so it is also called sheet metal screw.

Product parameter

88彩票　　 Specification: 2.2-14

　　 Length: 3-180mm

88彩票　　Material: carbon steel

　　 head type: big flat head

　　Thread type: self-tapping

88彩票　　 slot type: quincunx

　　 Tensile strength: 450Mpa

　　Surface hardness: ≥450HV

88彩票　　Core hardness: 270-390HV

　　Surface treatment: Dacromet