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Product Details

Opus length bars are carefully manufactured to meet the length, flatness and parallelism tolerances of BS 5317 (metric) BS 1790 (imperial) and are made from specially selected steel.

They have a round section and they have a threaded hole in the centre  which allows the bars to be safely and accurately joined together in various combinations.

The round section is 22mm / 7/8″ which gives them good stability and makes them easy to handle.

The gauging faces are hardened then precision lapped to meet the requirements of the relevant standard.

When wrung together or combined with the connection screws they provide secure lengths far in excess of that of standard gauge blocks.

The use of the screws allows the length bars to be safely used in the horizontal position as well as vertical, they also allow a range of accessories to be attached.

Please click here to view our range of length bar sets


  • Diameter 22mm (Metric Bars) or 7/8" (Imperial Bars)
  • Manufactured to BS5317 (Metric) or BS1790 (Imperial)
  • Available Grades Grade 1 & 2 (Metric) Inspection & Workshop Grade (Imperial)
  • Material: Hardened/End Hardened Tool Steel
  • Can be supplied as Sets or Individuals
  • Supplied with a UKAS Calibration Certificate
  • Manufactured in the UK by Opus Metrology

Key Features
  • Able to be joined together with the use of connecting screws

See our other products

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Contact Details


Phone: +44(0) 1536 204681
Fax: +44(0) 1536 205272

Unit 15 Maylan Road
Earlstrees Industrial Estate
NN17 4DR
Opening Times

Monday: 08:00 - 17:00
Tuesday: 08:00 - 17:00
Wednesday: 08:00 - 17:00
Thursday: 08:00 - 17:00
Friday: 08:00 - 13:00
Saturday: Closed
Sunday: Closed