NPT Pipe Thread Gauges | McMaster-Carr

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	Pipe Size Pipe Size	Show

	Pipe Size Pipe Size	Hide

	Thread Type Thread Type

NPT

	Material Material

Steel

	Class Class

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

DFARS Specialty Metals
COTS-Exempt

	Hardness Hardness

Rockwell C60

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

REACH Compliant

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

RoHS Compliant

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4 Products

Threaded Plug Gauges for NPT Pipe Threads

A notch on the handle indicates when the internal NPT threads you’re checking are in tolerance. Gauges have a taperlock handle for quickly replacing worn gauges.

For technical drawings and 3-D models, click on a part number.

Class X
Pipe Size	Pitch Diameter Tolerance	Hardness	Material		Each
1	-0.0003" to 0.0003"	Rockwell C60	Tool Steel	00000000	0000000

Threaded Plug Gauges for NPT Pipe Threads with Calibration Certificate

Ensure the accuracy of internal NPT pipe thread measurements—these gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. A notch on the handle indicates when the threads you’re checking are in tolerance. Gauges have a taperlock handle for quickly replacing worn gauges.

For technical drawings and 3-D models, click on a part number.

Class X
Pipe Size	Pitch Diameter Tolerance	Hardness	Material		Each
1	-0.0003" to 0.0003"	Rockwell C60	Tool Steel	00000000	0000000

Threaded Ring Gauges for NPT Pipe Threads with Calibration Certificate

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

For technical drawings and 3-D models, click on a part number.

Class X
Pipe Size	Pitch Diameter Tolerance	Hardness	Material		Each
1	-0.0003" to 0.0003"	Rockwell C60	Tool Steel	00000000	0000000

Threaded Ring Gauges for NPT Pipe Threads

Check the external threads of NPT pipe to ensure they fall within tolerance.

For technical drawings and 3-D models, click on a part number.

Class X
Pipe Size	Pitch Diameter Tolerance	Hardness	Material		Each
1	-0.0003" to 0.0003"	Rockwell C60	Tool Steel	00000000	0000000