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)