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BSPP Thread Plug Gages

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BSPP Thread Plug Gages

  • Checks internal parallel threads
  • Checks the tolerance of the thread profile
  • 55 degree thread profile
  • GO/NOGO members
  • BSPP Plug Gage
  • BSPP Truncated Set Plugs
  • BSPP Progressive Check Plug


Part# Product Name Size TPI Price Sale Price
BSPPGP1 BSPP Go Plug Gage G1/8 28 $103.00 $98.00
BSPPNGP1 BSPP NoGo Plug Gage G1/8 28 $103.00 $98.00
BSPPPS1 BSPP Plug Gage Set G1/8 28 $217.00 $207.00
BSPPGP2 BSPP Go Plug Gage G1/4 19 $118.00 $112.00
BSPPNGP2 BSPP NoGo Plug Gage G1/4 19 $118.00 $112.00
BSPPPS2 BSPP Plug Gage Set G1/4 19 $250.00 $238.00
BSPPGP3 BSPP Go Plug Gage G3/8 19 $120.00 $114.00
BSPPNGP3 BSPP NoGo Plug Gage G3/8 19 $120.00 $114.00
BSPPPS3 BSPP Plug Gage Set G3/8 19 $254.00 $242.00
BSPPGP4 BSPP Go Plug Gage G1/2 14 $127.00 $121.00
BSPPNGP4 BSPP NoGo Plug Gage G1/2 14 $127.00 $121.00
BSPPPS4 BSPP Plug Gage Set G1/2 14 $273.00 $260.00
BSPPGP5 BSPP Go Plug Gage G5/8 14 $137.00 $130.00
BSPPNGP5 BSPP NoGo Plug Gage G5/8 14 $137.00 $130.00
BSPPPS5 BSPP Plug Gage Set G5/8 14 $294.00 $280.00
BSPPGP6 BSPP Go Plug Gage G3/4 14 $141.00 $134.00
BSPPNGP6 BSPP NoGo Plug Gage G3/4 14 $141.00 $134.00
BSPPPS6 BSPP Plug Gage Set G3/4 14 $300.00 $286.00
BSPPGP7 BSPP Go Plug Gage G7/8 14 $151.00 $144.00
BSPPNGP7 BSPP NoGo Plug Gage G7/8 14 $151.00 $144.00
BSPPPS7 BSPP Plug Gage Set G7/8 14 $327.00 $311.00
BSPPGP8 BSPP Go Plug Gage G1 11 $159.00 $151.00
BSPPNGP8 BSPP NoGo Plug Gage G1 11 $159.00 $151.00
BSPPPS8 BSPP Plug Gage Set G1 11 $341.00 $325.00
BSPPGP9 BSPP Go Plug Gage G1-1/8 11 $185.00 $176.00
BSPPNGP9 BSPP NoGo Plug Gage G1-1/8 11 $185.00 $176.00
BSPPPS9 BSPP Plug Gage Set G1-1/8 11 $400.00 $381.00
BSPPGP10 BSPP Go Plug Gage G1-1/4 11 $185.00 $176.00
BSPPNGP10 BSPP NoGo Plug Gage G1-1/4 11 $185.00 $176.00
BSPPPS10 BSPP Plug Gage Set G1-1/4 11 $400.00 $381.00
BSPPGP11 BSPP Go Plug Gage G1-1/2 11 $195.00 $186.00
BSPPNGP11 BSPP NoGo Plug Gage G1-1/2 11 $195.00 $186.00
BSPPPS11 BSPP Plug Gage Set G1-1/2 11 $438.00 $417.00
BSPPGP12 BSPP Go Plug Gage G1-3/4 11 $208.00 $198.00
BSPPNGP12 BSPP NoGo Plug Gage G1-3/4 11 $208.00 $198.00
BSPPPS12 BSPP Plug Gage Set G1-3/4 11 $464.00 $442.00
BSPPGP13 BSPP Go Plug Gage G2 11 $223.00 $212.00
BSPPNGP13 BSPP NoGo Plug Gage G2 11 $223.00 $212.00
BSPPPS13 BSPP Plug Gage Set G2 11 $499.00 $475.00
BSPPGP14 BSPP Go Plug Gage G2-1/4 11 $305.00 $290.00
BSPPNGP14 BSPP NoGo Plug Gage G2-1/4 11 $305.00 $290.00
BSPPPS14 BSPP Plug Gage Set G2-1/4 11 $675.00 $643.00
BSPPGP15 BSPP Go Plug Gage G2-1/2 11 $305.00 $290.00
BSPPNGP15 BSPP NoGo Plug Gage G2-1/2 11 $305.00 $290.00
BSPPPS15 BSPP Plug Gage Set G2-1/2 11 $675.00 $643.00
BSPPGP16 BSPP Go Plug Gage G3 11 $364.00 $347.00
BSPPNGP16 BSPP NoGo Plug Gage G3 11 $364.00 $347.00
BSPPPS16 BSPP Plug Gage Set G3 11 $804.00 $766.00
BSPPGP17 BSPP Go Plug Gage G3-1/2 11 $410.00 $390.00
BSPPNGP17 BSPP NoGo Plug Gage G3-1/2 11 $410.00 $390.00
BSPPPS17 BSPP Plug Gage Set G3-1/2 11 $904.00 $861.00
BSPPGP18 BSPP Go Plug Gage G4 11 $501.00 $477.00
BSPPNGP18 BSPP NoGo Plug Gage G4 11 $501.00 $477.00
BSPPPS18 BSPP Plug Gage Set G4 11 $1,103.00 $1,050.00
BSPPGP19 BSPP Go Plug Gage G5 11 $681.00 $649.00
BSPPNGP19 BSPP NoGo Plug Gage G5 11 $681.00 $649.00
BSPPPS19 BSPP Plug Gage Set G5 11 $1,496.00 $1,425.00
BSPPGP20 BSPP Go Plug Gage G6 11 $756.00 $720.00
BSPPNGP20 BSPP NoGo Plug Gage G6 11 $756.00 $720.00
BSPPPS20 BSPP Plug Gage Set G6 11 $1,658.00 $1,579.00


BSPP is also known as British Standard Pipe Parallel. This gage checks the internal parallel threads that do not create pressure-tight joints. They utilize GO/NOGO members which allows the user to accurately check the tolerance of the thread profile. The standard of compliance 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. 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.

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