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ISO 261:1998

Current Date published:

ISO general purpose metric screw threads — General plan

This International Standard specifies ISO general purpose metric screw threads (M) having basic profile according to ISO 68-1. Basic dimensions are given in ISO 724. For tolerances see ISO 965-1.

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Related Information

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  • BS 1936-2:1991

    Undercuts and runouts for screw threads, Specification for ISO metric screw threads

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    ISO metric screw threads, Specification for selected limits of size

  • BS 4185-10:1977

    Machine tool components, Trapezoidal threads for lead and feed screw assemblies

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ISO 261:1998

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