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    12 Products

    Threaded Ring Gauges for Pipe Threads with Calibration Certificate

    These gauges come with a certificate that’s traceable to NIST, confirming they were calibrated in a lab. The certificate, sometimes called a test report or a long-form certificate, includes the tested measurements. Use these gauges to verify whether external pipe threads are within tolerance.
    Class X Gauge—NPTF Thread
    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads with Calibration Certificate.
    Image of Attribute. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads with Calibration Certificate.
    Use gauges with NPTF threads on their own. If it takes no more than one turn for the gauge to sit flush against the end of your threads, they’re within tolerance.
    Pipe
    Size
    Hardness
    Material
    Pitch Dia.
    Tolerance
    Certificate Type
    Each
    1/16
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"Calibration Certificate Traceable to NIST8400N310000000
    1/8
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"Calibration Certificate Traceable to NIST8400N32000000
    1/4
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"Calibration Certificate Traceable to NIST8400N33000000
    3/8
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"Calibration Certificate Traceable to NIST8400N34000000
    1/2
    		Rockwell C60Tool Steel
    		-0.0003" to 0.0003"Calibration Certificate Traceable to NIST8400N35000000
    3/4
    		Rockwell C60Tool Steel
    		-0.0003" to 0.0003"Calibration Certificate Traceable to NIST8400N36000000

    Threaded Ring Gauges for Pipe Threads

    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads.
    Confirm that external pipe threads are sized within tolerance. Manufactured with precision, these gauges meet tight thread tolerances themselves.
    Class X Gauge—NPTF Thread
    Use gauges with NPTF threads on their own for tests—if it takes no more than one turn for the gauge to sit flush against the end of the threads, they’re within tolerance.
    Pipe
    Size
    Hardness
    Material
    Pitch Dia.
    Tolerance
    Each
    1/16
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A1420000000
    1/8
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A143000000
    1/4
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A144000000
    3/8
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A145000000
    1/2
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A146000000
    3/4
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A147000000
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