Typically used to measure the minimum diameter and pitch diameter of a part, all of our gages are manufactured to exacting, precision standards so that you can be confident in the results of your readings.

North American Tool offers a complete line of thread plug and ring gages.

From taperlock and reversible options to Crest Check plugs and rings, we supply a range of industries with the essential tools that they need to complete their tasks accurately and efficiently. To learn more about our thread gages – and what dimensions we have available – please refer to the specifications provided below.

  • Thread Plug Gages – UNC, UNF & UNEF Class 2B – 3B, Taperlock & Reversible, + Metric Sizes – Class 6H
  • Thread Ring Gages – UNC, UNF & UNEF Class 2A – 3A + Metric Sizes – Class 6g
  • Truncated Thread Setting Plug Gages Class 2A – 3A + Metric Sizes – Class 6g
  • Thread Plug Gages – STI Screw Thread Insert
  • BSP Plug Gages (BSPT, BSPP)
  • Taper Pipe Gages – Plugs & Rings
    • NPT-L1, L1 & L2 Rings,
    • NPTF L1 & L3 Plugs,
    • NPTF Crest Check Plugs & Rings
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