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Straight Pipe Thread Ring Gages

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Straight Pipe Thread Ring Gages

  • Straight pipe thread ring gages are used to measure threads on an outside diameter
  • Root relieved for longer life and more accurate gaging
  • Manufactured to X tolerance and American Gage Design standard
  • Class 2A, GO or NOGO members
  • Precision hand lapped to provide optimum finish and superior accuracy
  • Manufactured to the highest end of the ANSI specifications to provide maximum wearability
  • Final inspection of gages is completed in an environmentally controlled ISO 17025 laboratory
  • Available in NPSM, NPSC, NPSL, NPSF and NPSI
  • Free NIST certificate of accuracy

Straight Pipe Threads Table Chart ANSI




Size Member Item # Price
1/8-27 GO / NOGOSPRG-01Call
SETSPRGS-01Call
1/4-18 GO / NOGOSPRG-02Call
SETSPRGS-02Call
3/8-18 GO / NOGOSPRG-03Call
SETSPRGS-03Call
1/2-14 GO / NOGOSPRG-04Call
SETSPRGS-04Call
3/4-14 GO / NOGOSPRG-05Call
SETSPRGS-05Call
1-11 1/2 GO / NOGOSPRG-06Call
SETSPRGS-06Call
1 1/4-11 1/2 GO / NOGOSPRG-07Call
SETSPRGS-07Call
1 1/2-11 1/2 GO / NOGOSPRG-08Call
SETSPRGS-08Call
2-11 1/2 GO / NOGOSPRG-09Call
SETSPRGS-09Call
2 1/2-8 GO / NOGOSPRG-10Call
SETSPRGS-10Call
3-8 GO / NOGOSPRG-11Call
SETSPRGS-11Call


Straight pipe thread ring gage is adjustable and used to measure threads on an outside diameter (OD) to ensure the threads are within its designed tolerance limits. The gage is a one piece construction with a single setting adjustment feature, manufactured to an X tolerance and American Gage Design standards (AGD).

Straight pipe thread ring gages are root relieved for longer life and more accurate gaging. They are manufactured with a root clearance in the major diameter which eliminates the possibility of interference from the full form section of the thread setting plug and major diameter of the part being gaged. This feature assures that the thread flanks are making proper contact.

Straight pipe thread gages are supplied in Class 2A for rings and set plugs and 2B for working thread plug gages. Manufactured to Class 2A, GO or NOGO members. Class and tolerances conform to ASME/ANSI B1. Thread inserts are made of oil hardening graphitic tool steel, manufactured to the highest end of the ANSI specifications, ring lapped and hand polished to ensure maximum wearability. Available in NPSM, NPSC, NPSL, NPSF and NPSI (Description and applications below)


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