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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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Pages: 48

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BS 1981:1991

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