self-tapping screw

Product Description

Self Tapping Screws

DIN7971, DIN7972, DIN7973, DIN7981, DIN7982, DIN7983
ASME B18.6.4 & SAE J933 specifications

Self tapping screws are most often used to fasten sheet metal composite materials, woods and plastics. They have a high tensile strength value, and are durable enough to handle repeated assembly and disassembly. There are three different kinds of self tapping screws: thread forming, thread cutting, and thread rolling.

Specifications:
Head: Pan head, Flat head, Indented hex head, Indented hex washer head, Serrated hex washer head, Truss head, Oval head, wafer head, Round head
Recess: Phillips, Slotted, Phillips/Slotted, Hex, Slotted/Hex, Torx, Pozi, Square
Diameter: #4 - #14
Length: 3/8" - 5"

Features:
Thread & Point Type: Type A, Type B, Type AB, Type 1, Type 23, Type 25, Type Hi-low, Type F
Material: Carbon steel, Stainless steel
Surface hardness: Steel/Rockwell C45 min. / Core hardness: Steel/Rockwell C28-38(after tempering)
Zinc plated 3 - 5 my or 5 - 8 my