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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—NPT 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 NPT 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
    3/8
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"Calibration Certificate Traceable to NIST2121A1340000000
    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
    3/8
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"Calibration Certificate Traceable to NIST8400N340000000
    Class X Gauge—BSPT 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 BSPT 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
    3/8
    		Rockwell C60Tool Steel
    		-0.0003" to 0.0003"Calibration Certificate Traceable to NIST8400N130000000
    Class X Gauge—BSPP 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 BSPP threads in pairs for go/no-go tests. Go gauges check the maximum external thread size, and no-go gauges check the minimum. If the threads you’re testing thread into the go gauge but not the no-go gauge, they’re within tolerance.
    Go Gauge
    No-Go Gauge
    Pipe
    Size
    Hardness
    Material
    Certificate Type
    Pitch Dia.
    Tolerance
    Each
    Pitch Dia.
    Tolerance
    Each
    3/8
    		Rockwell C60Tool Steel
    		Calibration Certificate Traceable to NIST-0.0003" to 0"8400N1700000000" to 0.0003"8400N250000000

    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—NPT Thread
    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads.
    Use gauges with NPT 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
    3/8
    		Rockwell C60Tool Steel
    		-0.0002" to 0.0002"2365A2130000000
    Class X Gauge—NPTF Thread
    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads.
    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
    3/8
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A1450000000
    Class X Gauge—BSPT Thread
    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads.
    Use gauges with BSPT 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
    3/8
    		Rockwell C55Tool Steel
    		-0.0003" to 0.0003"2365A1240000000
    Class X Gauge—NPSM Thread
    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads.
    Use gauges with NPSM threads in pairs for go/no-go tests. Go gauges check the maximum external thread size, and no-go gauges check the minimum. If the threads you’re testing thread into the go gauge but not the no-go gauge, they’re within tolerance.
    Go Gauge
    No-Go Gauge
    Pipe
    Size
    Hardness
    Material
    Pitch Dia.
    Tolerance
    Each
    Pitch Dia.
    Tolerance
    Each
    3/8
    		Rockwell C60Tool Steel
    		0" to 0.0003"2365A1540000000-0.0003" to 0"2365A1590000000
    Class X Gauge—BSPP Thread
    Image of Product. Front orientation. Ring Gauges. Threaded Ring Gauges for Pipe Threads.
    Use gauges with BSPP threads in pairs for go/no-go tests. Go gauges check the maximum external thread size, and no-go gauges check the minimum. If the threads you’re testing thread into the go gauge but not the no-go gauge, they’re within tolerance.
    Go Gauge
    No-Go Gauge
    Pipe
    Size
    Hardness
    Material
    Pitch Dia.
    Tolerance
    Each
    Pitch Dia.
    Tolerance
    Each
    3/8
    		Rockwell C55Tool Steel
    		0" to 0.0003"2365A1280000000-0.0003" to 0"2365A1360000000
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