BS ISO 529:2017 - Short machine taps and hand taps

BS ISO 529:2017

Short machine taps and hand taps

Status : Current   Published : March 2017



This document specifies the general dimensions of short machine taps and hand taps. These dimensions, established as functions of the thread diameter and pitch, are the following:

  • length of thread (maximum);

  • overall length;

  • shank diameter and dimensions of driving square;

  • dimensions of the connecting portion between the shank and threaded part.

This document is applicable to taps intended for cutting the following threads:

  1. ISO metric threads:

    • coarse pitch;

    • fine pitch;

  2. ISO inch threads:

    • “Unified Coarse” series (UNC) and “Unified Fine” series (UNF);

  3. Inch threads, non-recommended:

    • “British Standard Whitworth” (BSW) and “British Standard Fine” (BSF);

    • “British Association” (BA).


The overall length, thread length and diameters of shank for taps whose thread diameter and pitch are not listed in tables are given in Table A.1a.


Annex B gives an abstract from ISO 237 for shank diameters and size of driving squares, for information.


Technical specifications for taps covered by this document (including marking) are given in ISO 8830.

Standard NumberBS ISO 529:2017
TitleShort machine taps and hand taps
Publication Date31 March 2017
Normative References(Required to achieve compliance to this standard)ISO 237
Informative References(Provided for Information)No other standards are informatively referenced
International RelationshipsISO 529:2017
DescriptorsSize, Threading tools, Dimensions, Taps (threading), Tool shanks, ISO metric threads, Unified screw threads, Whitworth screw threads, British Association screw threads, Cutting tools
Title in FrenchTarauds courts à machine et à main
ISBN978 0 580 90910 8
File Size660 KB

 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents

Develop a PAS

Develop a fast-track standardization document in 9-12 months

Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version

Worldwide Standards
We can source any standard from anywhere in the world