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BS 1981:1991

Specification for unified machine screws and machine screw nuts

Standard Details

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.

General Information

Status : Confirmed
Standard Type: Main
Document No: BS 1981:1991
Document Year: 1991
Pages: 48
  • Section Volume:
  • GBM11 Screw Threads & Fasteners (GMB11)

Life Cycle

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Confirmed
BS 1981:1991

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