BS ISO 529:2017

What is ISO 529 – Short machine taps and hand taps about?  

This international standard helps its users to produce quality short machine taps and hand taps. 

ISO 529 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 

ISO 529 is applicable to taps intended for cutting the following threads: 

ISO metric threads: 

• Coarse pitch 
• Fine pitch 

ISO inch threads: 

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

Inch threads, non-recommended: 

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

Who is ISO 529 – Short machine taps and hand taps for? 

ISO 529 on short machine taps and hand taps is useful for: 

• Manufacturers of machine and hand taps 
• Manufacturers of screws and nut bolts 
• Designers of machine taps and hand taps 

Why should you use ISO 529 – Short machine taps and hand taps?  

Short machine taps and hand taps are used in the metal works industry for cutting threads in screws and nut bolts. These taps need to be designed carefully as they directly affect the threading quality of screws and affect their quality. 

ISO 529 provides you with accurate dimensions and tolerances for short machine taps and hand taps. Overall, the guidelines of ISO 529 help you to produce quality machine and hand taps, thereby ensuring the threading quality of screws and nut bolts. 

What’s changed since the last update?  

BS ISO 529:2017 replaces ISO 529:1993, of which it constitutes a minor revision with the following changes: 

• Added Annex C giving the relationship between the symbols of this document and the symbols according to the ISO 13399 series