Hexalobular socket large flat head tapping screws
Categories: Self-tapping screws
Product details
Product Introduction
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
Specification: 2.2-14
Length: 3-180mm
Material: carbon steel
head type: big flat head
Thread type: self-tapping
slot type: quincunx
Tensile strength: 450Mpa
Surface hardness: ≥450HV
Core hardness: 270-390HV
Surface treatment: Dacromet