Helicoil Thread Gauges | McMaster-Carr

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Grease Fittings

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581 Products

Size Checking

Go/No-Go Threaded Plug Gauges with Handle

Speed up thread tolerance checks—the handle on these gauges gives you a good grip to quickly thread and unthread go or no-go gauges.

Go/No-Go Helical Insert Threaded
Plug Gauges with Handle

Check that holes tapped for helical threads are within tolerance. To speed up tests, these gauges have a go gauge on one end and a no-go gauge on the other.

Go/No-Go Left-Hand Threaded
Plug Gauges with Handle

A go and no-go gauge in one, these gauges check that left-hand threads fall within tolerance.

Acme Threaded Plug Gauges with Handle

Determine if lead nuts, screw collars, and other parts with internal Acme threads are within tolerance. These gauges are attached to a handle to help you quickly thread or unthread them.

Threaded Plug Gauges with
Handle for Pipe Threads

Verify whether pipe fitting threads fall within tolerance. These gauges are attached to a handle, giving you a solid gripping point to thread and unthread them quickly.

Threaded Plug Gauges

Test if internal threads fall within tolerance.

Threads per Inch and Thread Pitch Size Checkers

Threads per Inch and Thread Pitch Size Checkers

Inspect fasteners and verify threads with this checker.

Size Identifying

Screw Size Identifiers

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

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

Mount to a wall for easy access, and thread your fastener into holes or onto plugs for quick and accurate size identification.

Thread-It Screw, Bolt, and Nut Size Identifiers

Thread your fastener into holes or onto plugs for quick and accurate size identification.

Screw, Bolt, and Nut Size Identifiers

Use on external and internal fastener threads.

Thread Identifier Sets

Set includes calipers and gauges to identify external and internal threads

Threads per Inch and Thread Pitch Identifiers

Determine threads per inch and thread pitch on nuts, bolts, and other fasteners.

Threads per Inch and Center Identifiers

Identify threads per inch on external threads and find the center of your workpiece to line up thread cutting tools.

Pipe Thread and Thread Pitch Identifiers

In addition to checking NPT and BSPT pipe sizes, use the two included gauges for measuring thread pitch.

Pipe Thread Identifiers

Pipe Thread Identifiers

Check external NPT thread size and taper.

Grease Fitting Size Identifiers

Take the guesswork out of determining a grease fitting’s thread type and size.

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