Screw ring calibration in laboratory

Thread Gauges Calibration

ANSI/ASME B1.20.1-2013, ANSI/ASME B1.20.5 : 1991, BS 21 : 1985, BS1580, BS2779, BS3643, BS84, BS93, H28

Calibration ensures that screw gauges provide accurate measurements, which is critical for ensuring that threaded parts fit together correctly. Rhopoint Metrology offers ISO 17025 certified calibration.

Read more on how to care for your thread gauges.

Thread Gauges Calibration Services

Thread Pitch Gauges

To Top
Traceable Calibration for Thread Pitch Gauges – Per BladeTraceable£4.00

Thread Plug Gauges

To Top
UKAS Calibration for Screw Plug – Parallel – Single Ended – up to 100 mm (up to 4″)UKAS£12.00
UKAS Calibration for Screw Plug – Parallel – Single Ended – 100 – 150 mm (4 – 6″)UKAS£19.00
UKAS Calibration for Screw Plug – Parallel – Single Ended – 150 – 250 mm (6 – 10″)UKAS£29.00
UKAS Calibration for Screw Plug – Parallel – Single Ended – above 250 mm (above 10″)UKAS£50.00
UKAS Calibration for Screw Plug – Parallel – Double Ended – up to 100 mm (up to 4″)UKAS£19.00
UKAS Calibration for Screw Plug – Parallel – Double Ended – 100 – 150 mm (4 – 6″)UKAS£28.00
UKAS Calibration for Screw Plug – Parallel – Double Ended – 150 – 250 mm (6 – 10″)UKAS£40.00
UKAS Calibration for Screw Plug – Parallel – Double Ended – above 250 mm (above 10″)UKAS£57.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Taper – up to 50 mm (up to 2″)UKAS£25.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Taper – above 50 mm (Above 2″)UKAS£34.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Trapezoidal / Acme – up to 50 mm (up to 2″)UKAS£50.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Trapezoidal / Acme – 50 up to 150mm (above 2″ – 6″)UKAS£63.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Trapezoidal / Acme – 150 up to 250mm (over 6 up to 10″)UKAS£79.00
Traceable Calibration for Screw Plug Gauge – Line Pipe – up to 25mm (Up to 1″)Traceable£53.00
Traceable Calibration for Screw Plug Gauge – Line Pipe – 25mm – 50mm (From 1 – 2″)Traceable£70.00
Traceable Calibration for Screw Plug Gauge – Line Pipe – 50mm – 100mm (From 2 – 4″)Traceable£84.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Buttress – up to 50 mm (up to 2″)UKAS£53.00
UKAS Calibration for Plug Gauges – Threaded (Screw Plugs) – Buttress – above 50 mm (above 2″)UKAS£75.00

Thread Ring Gauges

To Top
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Parallel – up to 100 mm (up to 4″)UKAS£23.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Parallel – 100 – 150 mm (4 – 6″)UKAS£28.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Parallel – 150 – 250 mm (6 – 10″)UKAS£34.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Parallel – above 250 mm (above 10″)UKAS£74.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Taper – up to 100 mm (up to 4″)UKAS£34.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Taper – above 100 mm (above 4″)UKAS£50.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Trapezoidal – up to 50 mm (up to 2″)UKAS£69.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Acme – up to 50 mm (up to 2″)UKAS£69.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Acme – above 50 mm (above 2″)UKAS£86.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Buttress – up to 50 mm (up to 2″)UKAS£69.00
UKAS Calibration for Ring Gauges – Threaded (Screw Rings) – Buttress – above 50 mm (above 2″)UKAS£86.00
Traceable Calibration for Ring Gauges – Threaded (Screw Rings) – Line PipeTraceable£88.00

Thread Caliper Gauges

To Top
UKAS Calibration for Screw Calipers – Calibration Only (Subject to setting plug availability)UKAS£33.00
UKAS Calibration for Screw Calipers – Regrind, Reset & CalibrationUKAS£67.00

Need assistance with your calibration?

If you haven’t found the calibration you require or need some further assistance with your requirement, contact us using this form and we can find the solution you are looking for.ย 

To ensure we can promptly address your calibration enquiry, please complete the form with all the necessary details. This will help us to provide you with accurate and timely assistance.

For urgent enquiries, please contact us directly via phone at:

Thread Gauges

BS 84: 2007, BS 1580: 2007, BS 3643: 2007, BS 93: 2008, BS 4377: 1991, BSA: 346: 2000, BSA 358-1: 2000, ASME B1.5: 1997, ANSI B1.8: 1977, BS EN ISO 228-1: 2003, BS EN 10226-3: 2005, ISO 7-2: 2000, BS 1104: 1957, BS 6293-2: 1994, ISO 5855-2: 1988, BS 5346: 1976, BS 4568-1: 1970, BS 4084: 1978, ISO 3161: 1977, BS 3409-1: 1961, BS 2779: 1986, BS 4568: 1970, BS 1657: 1950, BS 341-1: 1991, BS 21: 1985

Theses standards specify the tolerances and limits for simple forms of thread gauges, such as:

Parallel thread plug gauges

Parallel thread ring gauges

Care and use

  1. Always select the thread gauge that best fits the application
  2. Care should be taken while using thread gauges.ย  Should you drop a thread gauge, it should be re-calibrated/repaired before reusing it
  3. Gauges should be protected from damage when not in use. Rhopoint recommend applying a specialist coating to the thread gauge when not in use, (full details on this process is available directly from Rhopoint, contact us for further information)
  4. Do not use excessive force when applying the gauge to the component as this may result in either damage to the component or gauge
  5. Never use a thread gauge that has not been calibrated, if in doubt consult an appropriate authority.

It is highly recommended that an appropriate authority such as a UKAS approved laboratory carries out a full calibration on thread gauges at least once a year. In between UKAS calibrations at a frequency based on usage, thread gauges should be calibrated in-house. A typical in-house calibration would include a written procedure and an associated calibration record sheet, which would contain as a minimum, the following listed information:

Thread gauges

(a) Serial number

(b) Location

(c) Procedure number

(d) Rate and compression correction

(e) Gauge tolerance

(f) Results

(g) Measurement uncertainty

(h) Sentence if appropriate

(i) Date and calibrators signature

(j) Traceability to National Standards

It is necessary that any person carrying out such calibration work should have received appropriate training and have shown the ability to be confident via a suitable training authority. Training records should be held and maintained.

Following are layouts for typical in-house calibrations for thread gauges:

Calibration to be carried out in accordance with in-house procedure number …………………..

Serial Number: Make:

Calibration Date: Sizes:

FEATURE EXAMINEDย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย  SPEC.ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย ย  MEASURED RESULTS

GO:

Major diameter

Pitch diameter

Minor diameter

NOT GO:

Major diameter

Pitch diameter

Minor diameter

(Go and NOT go are measured at the front, middle and back of the thread)

The thread gauges were visually inspected for damage and the following faults were noted:

MEASUREMENT UNCERTAINTY +/- 0.003mm (1-100mm range)

Source: UKAS schedule of accreditation, Calibration and measurement capability (CMC)

Calibrators Signature: ………………………………….

A traceability statement in this section would be required for all items and their relevant certification utilised for the calibration of thread gauges.

UKAS Calibration

All of our Laboratories are accredited to provide UKAS & Traceable calibrations to all the relevant standards giving you peace of mind.

Benefits of Calibration

Accurate & Reliable

Make consistent, accurate and reliable measurements

Increase Product Life

Ensure longevity of the measuring instruments

Safety and Reliability

Ensure safety in critical applications such as medical and aerospace