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Gages

BSF Go/NoGo Thread Ring

BSF Go/NoGo Thread Ring

BSF Go/NoGo Thread Ring

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BSF Go/NoGo Thread Ring
Part#BSFTRG7
size 9/16
TPI 16
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BSF also is known as British Standard Fine screw thread. They are of the Whitworth form having a 55 degree included angle. These gages were created because Whitworth gages could be too coarse. This thread form is now more often used for replacement parts. BSF bolts hold many engine and gearbox parts in a Series One.

WESTport provides a complete line of BSF (British Standard Fine) Thread Plug Gages. They are available in sizes from 3/16 inch to 4 inches. Free Technical support is available from our core of engineers to assist you with any questions you may have. A certificate of calibration also comes free of charge with each gage.


  • British Standard Fine
  • Whitworth form
  • 55 degree included angle
  • Free certificate of calibration

partBSFTRG7
size 9/16
TPI 16

Gages