Ring Gauges | McMaster-Carr

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System of Measurement

Gauge Size

0.1501" to 0.2400"

0.2401" to 0.3650"

0.3650" to 0.5100"

0.3651" to 0.5100"

Size-Checking Gauge Class

Gauge Measurement Type

Thread Size

Thread Type

Thread Fit

Metric Class 6g

Unified Standard Class 2A

Unified Standard Class 3A

Surface Smoothness, RMS

REACH

Export Control Classification Number (ECCN)

Material

Hardness

Certificate Type

Accuracy Certificate Traceable to NIST

Calibration Certificate Traceable to NIST

DFARS Specialty Metals

RoHS

Thread Direction

Pipe Size

Pitch

For Ring Gauge Size

0.050" to 0.150"

0.150" to 0.240"

0.240" to 0.365"

0.365" to 0.510"

0.510" to 0.825"

0.825" to 1.135"

1.135" to 1.510"

1.270 mm to 3.810 mm

3.810 mm to 6.096 mm

6.096 mm to 9.271 mm

9.271 mm to 12.954 mm

12.954 mm to 20.955 mm

20.955 mm to 28.829 mm

28.829 mm to 38.354 mm

Length

Screw Size

Overall Length

How can we improve?

871 Products

Measuring and Inspecting

Ring Gauges

Confirm your workpiece's outer diameter or external threads are within tolerance

Ring Gauge Holders

Ring Gauge Holders

Keep ring gauges still to measure cylindrical parts or threads quickly and repeatedly

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)