UNF Thread Gauges | McMaster-Carr

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Unified Standard Class 2A

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

REACH

371 Products

Thread Size Identifiers

Wall-Mount Thread-It Screw, Bolt, and Nut Size Identifiers

Mount to a wall for easy access
Thread fasteners into holes or onto plugs to quickly find thread size

1 product

Threads per Inch and Thread Pitch Identifiers

Press against threads to measure pitch and threads per inch

11 products

Thread Identifier Sets

Includes calipers and gauges to identify external and internal threads

1 product

Thread-It Screw, Bolt, and Nut Size Identifiers

Thread fasteners into holes or onto plugs to quickly find thread size

2 products

Screw Size Identifiers

Find thread size, screw size, diameter, and drill bit size with one tool

1 product

Grease Fitting Size Identifiers

Screw grease fittings into the labeled holes until you find the one that fits

1 product

Threads per Inch and Thread Pitch Size Checkers

Calculate pitch diameter with the included wires and equations

1 product

Threads per Inch and Center Identifiers

Measure external threads per inch and line up thread-cutting tools

1 product

Other Products

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

136 products

Ring Gauges

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

216 products