Ring Gauges | McMaster-Carr

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398 Products

Size Checking

Ring Gauges for Outside Diameters

Ring Gauges for Outside Diameters

Use these gauges to check the outside diameter of shafts, rods, and other cylindrical objects to determine whether they’re in tolerance.

Master Ring Gauges

Master Ring Gauges

Set inside micrometers, dial bore gauges, and other precision tools.

Ring Gauge Holders

Ring Gauge Holders

Often used with go and no-go ring gauges, these holders keep two ring gauges still for quick, repeat measuring.

Threaded Ring Gauges with Calibration Certificate

Threaded Ring Gauges with Calibration Certificate

A certificate of calibration traceable to NIST states that these gauges have passed a test for accuracy.

Threaded Ring Gauges

Threaded Ring Gauges

Check a part’s external threads to ensure they fall within tolerance.

Threaded Ring Gauges for NPT Pipe
Threads with Calibration Certificate

Threaded Ring Gauges for NPT Pipe Threads with Calibration Certificate

To ensure accuracy of NPT pipe thread measurements, these gauges include a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.

Threaded Ring Gauges for NPT Pipe Threads

Threaded Ring Gauges for NPT Pipe Threads

Measure NPT pipe threads.

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