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BSPP Thread Ring Gages

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BSPP Thread Ring Gages

  • Checks parallel threads
  • Checks external threads
  • GO/NOGO members
  • BSPP Adjustable Ring Gage
  • BSPP Solid Ring Gage


Part# Product Name Size TPI Price Sale Price
BSPPGAR1 BSPP Go Adjustable Ring Gage G1/8 28 $145.00 $131.00
BSPPNGAR1 BSPP NoGo Adjustable Ring Gage G1/8 28 $132.00 $120.00
BSPPARS1 BSPP Adjustable Ring Gage Set G1/8 28 $299.00 $273.00
BSPPGAR2 BSPP Go Adjustable Ring Gage G1/4 19 $167.00 $151.00
BSPPNGAR2 BSPP NoGo Adjustable Ring Gage G1/4 19 $150.00 $136.00
BSPPARS2 BSPP Adjustable Ring Gage Set G1/4 19 $339.00 $309.00
BSPPGAR3 BSPP Go Adjustable Ring Gage G3/8 19 $194.00 $175.00
BSPPNGAR3 BSPP NoGo Adjustable Ring Gage G3/8 19 $174.00 $158.00
BSPPARS3 BSPP Adjustable Ring Gage Set G3/8 19 $390.00 $355.00
BSPPGAR4 BSPP Go Adjustable Ring Gage G1/2 14 $222.00 $201.00
BSPPNGAR4 BSPP NoGo Adjustable Ring Gage G1/2 14 $200.00 $181.00
BSPPARS4 BSPP Adjustable Ring Gage Set G1/2 14 $445.00 $405.00
BSPPGAR5 BSPP Go Adjustable Ring Gage G5/8 14 $236.00 $213.00
BSPPNGAR5 BSPP NoGo Adjustable Ring Gage G5/8 14 $212.00 $192.00
BSPPARS5 BSPP Adjustable Ring Gage Set G5/8 14 $472.00 $429.00
BSPPGAR6 BSPP Go Adjustable Ring Gage G3/4 14 $254.00 $230.00
BSPPNGAR6 BSPP NoGo Adjustable Ring Gage G3/4 14 $229.00 $207.00
BSPPARS6 BSPP Adjustable Ring Gage Set G3/4 14 $507.00 $461.00
BSPPGAR7 BSPP Go Adjustable Ring Gage G7/8 14 $280.00 $253.00
BSPPNGAR7 BSPP NoGo Adjustable Ring Gage G7/8 14 $252.00 $228.00
BSPPARS7 BSPP Adjustable Ring Gage Set G7/8 14 $556.00 $505.00
BSPPGAR8 BSPP Go Adjustable Ring Gage G1 11 $305.00 $276.00
BSPPNGAR8 BSPP NoGo Adjustable Ring Gage G1 11 $274.00 $248.00
BSPPARS8 BSPP Adjustable Ring Gage Set G1 11 $605.00 $549.00
BSPPGAR9 BSPP Go Adjustable Ring Gage G1-1/8 11 $339.00 $307.00
BSPPNGAR9 BSPP NoGo Adjustable Ring Gage G1-1/8 11 $306.00 $276.00
BSPPARS9 BSPP Adjustable Ring Gage Set G1-1/8 11 $671.00 $610.00
BSPPGAR10 BSPP Go Adjustable Ring Gage G1-1/4 11 $362.00 $327.00
BSPPNGAR10 BSPP NoGo Adjustable Ring Gage G1-1/4 11 $326.00 $295.00
BSPPARS10 BSPP Adjustable Ring Gage Set G1-1/4 11 $723.00 $658.00
BSPPGAR11 BSPP Go Adjustable Ring Gage G1-1/2 11 $371.00 $336.00
BSPPNGAR11 BSPP NoGo Adjustable Ring Gage G1-1/2 11 $334.00 $302.00
BSPPARS11 BSPP Adjustable Ring Gage Set G1-1/2 11 $741.00 $674.00
BSPPGAR12 BSPP Go Adjustable Ring Gage G1-3/4 11 $396.00 $358.00
BSPPNGAR12 BSPP NoGo Adjustable Ring Gage G1-3/4 11 $373.00 $337.00
BSPPARS12 BSPP Adjustable Ring Gage Set G1-3/4 11 $804.00 $731.00
BSPPGAR13 BSPP Go Adjustable Ring Gage G2 11 $434.00 $393.00
BSPPNGAR13 BSPP NoGo Adjustable Ring Gage G2 11 $391.00 $353.00
BSPPARS13 BSPP Adjustable Ring Gage Set G2 11 $861.00 $782.00
BSPPGAR14 BSPP Go Adjustable Ring Gage G2-1/4 11 $603.00 $546.00
BSPPNGAR14 BSPP NoGo Adjustable Ring Gage G2-1/4 11 $543.00 $491.00
BSPPARS14 BSPP Adjustable Ring Gage Set G2-1/4 11 $1,182.00 $1,083.00
BSPPGAR15 BSPP Go Adjustable Ring Gage G2-1/2 11 $603.00 $546.00
BSPPNGAR15 BSPP NoGo Adjustable Ring Gage G2-1/2 11 $543.00 $491.00
BSPPARS15 BSPP Adjustable Ring Gage Set G2-1/2 11 $1,182.00 $1,083.00
BSPPGAR16 BSPP Go Adjustable Ring Gage G3 11 $700.00 $633.00
BSPPNGAR16 BSPP NoGo Adjustable Ring Gage G3 11 $630.00 $570.00
BSPPARS16 BSPP Adjustable Ring Gage Set G3 11 $1,366.00 $1,239.00
BSPPGAR17 BSPP Go Adjustable Ring Gage G3-1/2 11 $807.00 $730.00
BSPPNGAR17 BSPP NoGo Adjustable Ring Gage G3-1/2 11 $727.00 $657.00
BSPPARS17 BSPP Adjustable Ring Gage Set G3-1/2 11 $1,570.00 $1,424.00
BSPPGAR18 BSPP Go Adjustable Ring Gage G4 11 $938.00 $849.00
BSPPNGAR18 BSPP NoGo Adjustable Ring Gage G4 11 $844.00 $764.00
BSPPARS18 BSPP Adjustable Ring Gage Set G4 11 $1,818.00 $1,648.00
BSPPGAR19 BSPP Go Adjustable Ring Gage G5 11 $1,244.00 $1,125.00
BSPPNGAR19 BSPP NoGo Adjustable Ring Gage G5 11 $1,119.00 $1,013.00
BSPPARS19 BSPP Adjustable Ring Gage Set G5 11 $2,399.00 $2,174.00
BSPPGAR20 BSPP Go Adjustable Ring Gage G6 11 $1,548.00 $1,401.00
BSPPNGAR20 BSPP NoGo Adjustable Ring Gage G6 11 $1,393.00 $1,261.00
BSPPARS20 BSPP Adjustable Ring Gage Set G6 11 $2,978.00 $2,697.00


These gages checks parallel threads. However it checks the external threads instead of the internal threads. They utilize GO/NOGO members and the standard for this gage is ISO 228-1 and ISO 228-2.

ISO 228 ‐ 1 covers pipe threads where pressure‐tight joints are not made on the threads. ISO 228 ‐ 2 covers the limit gages for pipe threads where pressure‐tight joints are not made on the threads. BSPP thread plug gages have a 55 degree thread profile. This specification covers many GO and NOGO gages that are used to verify different elements of the thread. The GO gage insures that the profile of the machined piece does not exceed the maximum of material provided for by the tolerances applied to the dimensions of the profile defined by ISO 228‐1. The NOGO gage for the threads of the pieces fix the minimum material limit on the flanks of the thread. These gages are available in full form style compliant with the ISO specification or a modified style manufactured in the United States. The full form BSPP thread ring gages are made in a solid style and are available in Class A and Class B. The Class A GO BSPP ring gage are also compatible for Class B threads and are calibrated with a wear check plug gage. The NOGO Class B gage are quoted on request.

WESTport provides a complete line of BSPP British Standard Pipe Parallel Thread Gages. 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)