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BSW Bottoming HSS Tap by Bordo Size:5/16" x 18TPI also under difficult circumstances

SKU 64777169708
4.1
Description

also under difficult circumstances

hammer only and rotation only for added versatility

More Compact*

Features:- Tungsten carbide measuring faces

Very good adhesion on all usual porous building surfaces

BSW Bottoming HSS Tap by Bordo Size:5/16" x 18TPI also under difficult circumstancesAbout this product: HSS BSW Bottoming Hand and Machine Tap. British Standard Whitworth has a thread angle of 55 degrees as opposed to 60 degrees in Metric and Unified threads. This thread form was developed by Sir Joseph Whitworth in 1841. The thread form has rounded roots and crests and is specified in BS84: 1956. Bottoming Taps have a lead of two threads and are used to ensure minimum thread run out when tapping to the bottom of a blind hole.

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