BSI - BS 1981
Specification for Unified Machine Screws and Machine Screw Nuts
|Publication Date:||30 August 1991|
|ICS Code (Bolts, screws, studs):||21.060.10|
|ICS Code (Nuts):||21.060.20|
Applicable to machine screws and machine screw nuts having ISO inch screw threads and hexagon head and slotted or recessed heads with type Z and type V recess. Mechanical properties are specified for steel, brass and aluminium alloy screws and nuts.