Screw Plug Gauges

Screw Plug Gauges manufactured to the latest British, American and International standards. Most common thread forms are:

ISO metric, UN (unified), Whitworth (BSF, BSW), Pipe (BSP to ISO228) B.A., BSC (cycle) Aeronautical (MJ, UNJ), wire insert, Acme, Stub Acme, Trapezoidal, Buttress, Rd (round), Pg, NPSI, NPSF, NPSM

In ISO. metric threads the various classes of internal thread are 4H, 5H, 6H & 7H'. In Unified threads the various classes of internal threads are 1B, 2B & 3B. Whitworth and B.A. the various classes of thread are Close, Medium and Normal. Please contact us for any other thread form you may require.

All Gauges are available with in-house certificate or an Independent UKAS Certificate.

Screw Plug Gauges

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Industries Served

  • Aerospace
  • Automotive
  • Autosport
  • Avionics
  • Environmental Services
  • Medical
  • Military
  • Mining
  • Robotics
  • Security
  • Telecoms

About Mercury

Mercury Tool & Gauge offer an extensive range of products that are manufactured to meet the most demanding quality needs in today's market.


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  • Phone:
    +44 (0)2476- 694 -030
  • Fax:
    +44 (0)2476- 694 -070
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  • Address:
    Mercury Tool & Gauge
    221 Torrington Avenue
    CV4 9HN

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