UNC, UNF or UNEF if the diameter-pitch combination is from the “coarse”, “fine” or “extra fine” series and may also be followed by a tolerance class.

Example: #6-32 UNC 2B (major diameter: 0.1380 inch, pitch: 32 tpi) Unified Screw Threads – UNC, UNF and UNEF.

A wide range of GO/NO-GO fixed gauges are available for checking inside and outside threaded diameters, so as to ensure accuracy during the machining process. This ensures a “snug” fit between threaded components, which in turn phases out the loosening of screw-fastened joints in your final work piece.


What Thread Plug Checks?

  • A Thread Plug GO Gauge Checks The Minimum Major Diameter The Minimum Pitch Diameter Size In A Part.
  • A thread plug NO-GO Gauge Checks For The Hole Not To Exceed The Maximum Pitch Diameter Size In A Part.

Made Of:

  • Tempered, oil hardened Tool Steel.

Supplied As:

  • Double Ended
  • Member only

National Standard:

  • JIS-Japanese Industrial Standard.
  • ISO-International Organized Standards.
  • ANSI/ASME- American International Standards.
  • DIN-German International Standards.
  • BS 969-British Standards.
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