Metric Thread Gauges | McMaster-Carr

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	For System of Measurement For System of Measurement

Inch

Metric

	For Thread Type For Thread Type

	System of Measurement System of Measurement

Inch

Metric

	For Thread Location For Thread Location

External

Internal

	For Use With For Use With

	Thread Size Thread Size

	Material Material

	Container Type Container Type

Folding Case

Pouch

	For Thread Pitch For Thread Pitch

	Height Height

	For Threads per Inch For Threads per Inch

3
3 1/2
4
4 1/2
5
5 1/2
6
7
7 1/2
8
9
10
11
11 1/2
12
13
14
15
16
18
20
22
24
26
27
28
29
30
32
34
36
38
40
42
44
48
56

	Pitch Pitch

	Number of Identifiers Number of Identifiers

	Thread Type Thread Type

Metric

	For Screw Size For Screw Size

	Thickness Thickness

	Length Length

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Thread Fit For Thread Fit

Class 6g

Class 6H

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	Gauge Type Gauge Type

No-Go

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Number of Wires Number of Wires

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154 Products

Size Identifying

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.

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 a variety of external and internal threads.

Screw Size Identifiers

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

Screw, Bolt, and Nut Size Identifiers

Use on external and internal fastener threads.

Pipe Size Rulers

Measure outer diameter and mark lines around pipe.

Drill Bit Size Identifiers

Measure drill bit sizes with these identifiers.

Precision Radius Identifiers

Find precise convex and concave radii of tools, patterns, and dies.

Radius Identifiers

Check convex and concave radii of tools, patterns, and dies with these pocket-size tools.

Diameter Identifiers

Measure the outside diameter of small round- and hex-shaped objects such as rods, drill bits, bolts, and tubing with this pocket-size tool.

Size Checking

Threaded Plug Gauges

These have a go gauge on one end and a no-go gauge on the other end.

Threaded Plug Gauges with Calibration Certificate

These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.

Threaded Ring Gauges

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

Threaded Ring Gauges with Calibration Certificate

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

Threads per Inch and Thread Pitch Size Checkers

Inspect fasteners and verify threads with this checker.

Shatter-Resistant Sights

The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window.

Gear Tooth Pitch Identifiers

When replacing a gear, use these gauges to identify pressure angle, pitch, and module.

Size Identifying

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

Thread-It Screw, Bolt, and Nut Size Identifiers

Thread Identifier Sets

Threads per Inch and Thread Pitch Identifiers

Screw Size Identifiers

Screw, Bolt, and Nut Size Identifiers

Pipe Size Rulers

Drill Bit Size Identifiers

Precision Radius Identifiers

Radius Identifiers

Diameter Identifiers

Size Checking

Threaded Plug Gauges

Threaded Plug Gauges with Calibration Certificate

Threaded Ring Gauges

Threaded Ring Gauges with Calibration Certificate

Threads per Inch and Thread Pitch Size Checkers

Shatter-Resistant Sights

Shatter-Resistant Sights

Gear Tooth Pitch Identifiers

Gear Tooth Pitch Identifiers

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