Thread Identification

 

Screw Pitch Gaugescrew pitch gauge


It is critical that inserts match the tapped hole exactly as some inch and metric are very close but only one is
exactly right.

A screw pitch gauge is the perfect tool to identify exact TPI or pitch. 

see our range of Screw Pitch Gauges  

The bolt diameter should be measured and matched to the closest size over, relating to the TPI or pitch of the thread.

In general, major diameter of bolt or male thread will always be slightly less than the exact diameter listed in the thread identification and drill chart .


 

 

thread_identification

 

 

 
 

YouTube video "How to identify National Pipe Taper ( NPT ) and National Pipe Straight ( NPS ) pipe threads"

link to American Pipe Thread NPT and NPS Tables

link to British Pipe Thread BSPT and BSP Tables

link to Pitch Conversions threads per inch TPI pitch in inches and pitch in mm for taps and dies

 

June 2023, March 2022, Feb 2021, March 2017, Feb 2014,Aug 2011 CSS

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.

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