BS ISO 529:2017 pdf download – Short machine taps and hand taps
1 Scope
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:
一 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:a)ISo metric threads:
– coarse pitch;
– fine pitch;
b) ISO inch threads:
—“Unified Coarse” series (UNC) and “Unified Fine” series (UNF);cInch threads, non-recommended:
—“British Standard Whitworth” (BSW) and”British Standard Fine” (BSF);“British Association”(BA).
NOTE1 The overall length, thread length and diameters of shank for taps whose thread diameter and pitchare not listed in tables are given in Tablc A.1.
NOTE2 Annex B gives an abstract from 1so 237 for shank diameters and size of driving squares, forinformation.
NOTE3 Technical specifications for taps covered by this document [including marking)are given in IS0 8830.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies.ISO 237,Rotating tools with parallel shanks — Diameters of shanks and sizes of driving squares
Terms and definitions
No terms and definitions are listed in this document.
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4 ISO metric threads
4.1 Threads up to M25
4.1.1 Full-diameter shank taps with plain connecting portion