Hexagon Flange Head Self-Drilling Screws

产品介绍

Self-Drilling Screws also called dovetail screws , is a  self-tapping screw with a drilling tail , which can be drilled by itself when in use , without the need for pre-drilling . Widely used in steel structure color steel tile fixing, building sheet fixing and other fields . The self-Drilling screws has higher surface hardness and core hardness than the self-tapping screws , and can be used for multiple drilling.

产品信息

Productname: Hexagon Flange Head Self-Drilling Screws

surface hardness: min HV450

core hardness: HRC28-38

Surface treatment：Color-Plated zinc 

Material: Carbon Steel

Specification: ST3.5 – ST6.3

Standard:  GB/T 15856.4