BS 1981:1991
Current
Date published:
Specification for unified machine screws and machine screw nuts
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.
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BS 1981:1991
Get this standard
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PDF
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