Standard Thread Rings

Thread Rings in standard sizes –  Our standard thread ring gages (made in the USA) are adjustable and manufactured to an “X” tolerance per ANSI/ASME B1.2. These thread rings are used for checking male parts for quality.  We offer these in UNC, UNF, & UNEF. Class 1A, 2A, & 3A.  We keep many of these items in stock for fast delivery.

We also offer an array of UNS specialty thread ring gages and standard metric ring gages with delivery time that rivals the industry! Custom threads, “Pre Plate / Before Plate” , “W” tolerance thread gages are offered with little or no additional delivery time.


Standard Thread Ring

View descriptions and pricing for standard thread ring gages (pdf).

We certify our gages to meet or exceed all published specifications and are traceable to the NIST (National Institute of Standards and Technology), and in compliance with (ISO) 10012-1 and ANSI/NCSL Z540-1. Uncertainties have been estimated at a 95% confidence level (K=2). Environmental controls are monitored to maintain 68 degree F and 50% maximum humidity. When necessary we offer ISO 17025, A2LA Calibrations through our 3rd party laboratories.