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Gages

BA Thread Ring Gages

  • British Association
  • Checks small parts under 1/4 inch
  • Manufactured to nominal class
PART# PRODUCT NAME CLASS-OF-FIT PITCH STANDARD PRICE PRICE
BATRG0 BA Go/NoGo Thread Ring 1 Normal BS 93 & BS 919
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BATRGDE0 BA Thread Ring Gage Set 1 Normal BS 93 & BS 919
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BATRG1 BA Go/NoGo Thread Ring 0.9 Normal BS 93 & BS 919
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BATRGDE1 BA Thread Ring Gage Set 0.9 Normal BS 93 & BS 919
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BATRG2 BA Go/NoGo Thread Ring 0.81 Normal BS 93 & BS 919
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BATRGDE2 BA Thread Ring Gage Set 0.81 Normal BS 93 & BS 919
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BATRG3 BA Go/NoGo Thread Ring 0.73 Normal BS 93 & BS 919
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BATRGDE3 BA Thread Ring Gage Set 0.73 Normal BS 93 & BS 919
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BATRG4 BA Go/NoGo Thread Ring 0.66 Normal BS 93 & BS 919
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BATRGDE4 BA Thread Ring Gage Set 0.66 Normal BS 93 & BS 919
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BATRG5 BA Go/NoGo Thread Ring 0.59 Normal BS 93 & BS 919
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BATRGDE5 BA Thread Ring Gage Set 0.59 Normal BS 93 & BS 919
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BATRG6 BA Go/NoGo Thread Ring 0.53 Normal BS 93 & BS 919
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BATRGDE6 BA Thread Ring Gage Set 0.53 Normal BS 93 & BS 919
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BATRG7 BA Go/NoGo Thread Ring 0.48 Normal BS 93 & BS 919
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BATRGDE7 BA Thread Ring Gage Set 0.48 Normal BS 93 & BS 919
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BATRG8 BA Go/NoGo Thread Ring 0.43 Normal BS 93 & BS 919
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BATRGDE8 BA Thread Ring Gage Set 0.43 Normal BS 93 & BS 919
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BATRG9 BA Go/NoGo Thread Ring 0.39 Normal BS 93 & BS 919
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BATRGDE9 BA Thread Ring Gage Set 0.39 Normal BS 93 & BS 919
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BATRG10 BA Go/NoGo Thread Ring 0.35 Normal BS 93 & BS 919
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BATRGDE10 BA Thread Ring Gage Set 0.35 Normal BS 93 & BS 919
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BA also is known as British Association. The British Standards Association recommends this thread form for screws smaller than ¼ inch rather than using BSW and BSF threads. This gage checks British Association external threads. BA threads are similar to Whitworth threads in terms of rounded crests and roots except that the symmetrical angles are 47 degrees and 30 minutes and the crest and root radiuses are proportionately larger. BA thread ring gages conform to S.93. Tolerances are to BS.919 Part 2 2007. BA screw thread ring gages are manufactured to nominal class. All BA thread gages are right hand only. This thread form is rarely used in the United States.
WESTport provides a complete line of BA (British Association) Thread Ring Gages. They are available in sizes from BA 0 to BA 16. Free Technical support is available from our core of engineers to assist you with any questions you may have.

Gages