Taper Gauges

Mercury offer a full range of taper gauges including:

  • Taper screw ring gauges
  • Taper screw plug gauges
  • Taper plain ring gauges
  • Taper plain plug gauges
NPTF Screw Plug

Gauges can be supplied to cover all the main types of taper thread standards:

  • BSPT threads to BS21
  • ISO 7
  • NPT to ANSI/ASME B1.20.1
  • NPTF to ASME B1.20.5
  • ANPT to MIL-P-7105B / SAE AS71051B
  • NGT to H28/9A

Gas cylinder valve outlets & connectors

  • To BS341, BS EN ISO 11363 and DIN477

In addition to the above standard gauges, plain taper rings & plain taper plugs can be manufactured to suit customer gauge or component drawings.

Plain Plug Gauge

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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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