roduct Introduction

　　American cylinder head tapping screw is also called cylinder head quick tapping screw. It is a kind of fast installation American standard fastener products made of carbon steel and passivated on the surface. The environmentally friendly black zinc used on the surface can greatly enhance the corrosion resistance of the screw, and the rounded cylindrical head will not scratch the hands, and it is very convenient to screw in.

88彩票Product parameter

88彩票　　 Specification: 2.2-14

88彩票　　 Length: 3-180mm

88彩票　　Material: carbon steel

88彩票　　 head type: cylindrical head

　　Thread type: self-tapping

88彩票　　Groove: Hexagon socket

88彩票　　 Tensile strength: 450Mpa

88彩票　　Surface hardness: ≥450HV

　　Core hardness: 270-390HV

　　Surface treatment: environmentally friendly black zinc