DIN 7991 hex socket countersunk screw has external thread that commonly used in machine parts, clamping, mould fixing and so on. The flat socket head enables driving where there is not sufficient space for wrenches or sockets and allows the screw head to sit flush on the surface.Countersunk Head Screws
The hex socket screw drive has a hexagonal recess and may be driven by a hex wrench, also known as an Allen wrench, Allen key, hex key as well as by a hex screwdriver (also known as a hex driver) or a bit. Hex Socket Countersunk Head Screw
Material
Stainless steel 201, 665, 667, 304, 316, etc
Standard
GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
Non-standards
OEM is available, according to drawing or samples
Finish
Plain/accor…