Taperlock Plugs

Application:  Gaging internal threads.

Our “Made in the USA” Class 2B & 3B Taperlock thread plug gages are manufactured to an “X” tolerance.  Made of machine tool steel and traceable to NIST.

60 Degree Thread Types

  • UNC – Unified National Coarse
  • UNF – Unified National Fine
  • UNEF – Unified National Extra Fine
  • UNS – Unified National Special
  • UNJ –  for added tensile strength

ACME Thread Plug Gages also available, please contact us for more details.

taperlock plug gage

View descriptions and pricing for taperlock plugs. (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.