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BSF Thread Ring Gages

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BSF Thread Ring Gages

  • British Standard Fine
  • Checks parallel screw threads
  • Whitworth form
  • 55 degree included angle


Part# Product Name Size TPI Price
BSFTRG1 BSF Go/NoGo Thread Ring 3/16 32 Call
BSFTRGS1 BSF Thread Ring Gage Set 3/16 32 Call
BSFTRG2 BSF Go/NoGo Thread Ring 1/4 26 Call
BSFTRGS2 BSF Thread Ring Gage Set 1/4 26 Call
BSFTRG3 BSF Go/NoGo Thread Ring 5/16 22 Call
BSFTRGS3 BSF Thread Ring Gage Set 5/16 22 Call
BSFTRG4 BSF Go/NoGo Thread Ring 3/8 20 Call
BSFTRGS4 BSF Thread Ring Gage Set 3/8 20 Call
BSFTRG5 BSF Go/NoGo Thread Ring 7/16 18 Call
BSFTRGS5 BSF Thread Ring Gage Set 7/16 18 Call
BSFTRG6 BSF Go/NoGo Thread Ring 1/2 16 Call
BSFTRGS6 BSF Thread Ring Gage Set 1/2 16 Call
BSFTRG7 BSF Go/NoGo Thread Ring 9/16 16 Call
BSFTRGS7 BSF Thread Ring Gage Set 9/16 16 Call
BSFTRG8 BSF Go/NoGo Thread Ring 5/8 14 Call
BSFTRGS8 BSF Thread Ring Gage Set 5/8 14 Call
BSFTRG9 BSF Go/NoGo Thread Ring 3/4 12 Call
BSFTRGS9 BSF Thread Ring Gage Set 3/4 12 Call
BSFTRG10 BSF Go/NoGo Thread Ring 7/8 11 Call
BSFTRGS10 BSF Thread Ring Gage Set 7/8 11 Call
BSFTRG11 BSF Go/NoGo Thread Ring 1 10 Call
BSFTRGS11 BSF Thread Ring Gage Set 1 10 Call
BSFTRG12 BSF Go/NoGo Thread Ring 1 1/8 9 Call
BSFTRGS12 BSF Thread Ring Gage Set 1 1/8 9 Call
BSFTRG13 BSF Go/NoGo Thread Ring 1 1/4 9 Call
BSFTRGS13 BSF Thread Ring Gage Set 1 1/4 9 Call
BSFTRG14 BSF Go/NoGo Thread Ring 1 3/8 8 Call
BSFTRGS14 BSF Thread Ring Gage Set 1 3/8 8 Call
BSFTRG15 BSF Go/NoGo Thread Ring 1 1/2 8 Call
BSFTRGS15 BSF Thread Ring Gage Set 1 1/2 8 Call


BSF also is known as British Standard Fine screw thread. These gages check the parallel screw thread of Whitworth form. This form has a 55 degree included angle.
WESTport provides a complete line of BSF (British Standard Fine) Thread Ring 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.

WESTport Manufactured Products. 24th Anniversary Servicing Industry Worldwide (1989-2013)