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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.
| Pipe Size | Pipe Size Tolerance | Hardness | Material | Each | |
Class X | |||||
|---|---|---|---|---|---|
| 1/16 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 0000000 | 0000000 |
| 1/8 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 00000 |
| 1/4 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 00000 |
| 3/8 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 00000 |
| 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/4 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/4 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
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.
| Pipe Size | Pipe Size Tolerance | Hardness | Material | Each | |
Class X | |||||
|---|---|---|---|---|---|
| 1/16 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 0000000 |
| 1/8 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1/4 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/8 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/4 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/4 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 2 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3-8 | -0.0005" to 0.0005" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 4-8 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
Threaded Ring Gauges for NPT Pipe Threads
Check the external threads of NPT pipe to ensure they fall within tolerance.
| Pipe Size | Pipe Size Tolerance | Hardness | Material | Each | |
Class X | |||||
|---|---|---|---|---|---|
| 1/16-27 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 0000000 | 0000000 |
| 1/8-27 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1/4-18 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/8-18 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1/2-14 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/4-14 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/4-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/2-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 2-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
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.
| Pipe Size | Pipe Size Tolerance | Hardness | Material | Each | |
Class X | |||||
|---|---|---|---|---|---|
| 1/16-27 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 0000000 |
| 1/8-27 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1/4-18 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/8-18 | -0.0002" to 0.0002" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1/2-14 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3/4-14 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/4-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 1 1/2-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 2-11 1/2 | -0.0003" to 0.0003" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 2 1/2-8 | -0.0005" to 0.0005" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 3-8 | -0.0005" to 0.0005" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
| 4-8 | -0.0005" to 0.0005" | Rockwell C60 | Tool Steel | 00000000 | 000000 |
Pipe Thread and Thread Pitch Identifiers
In addition to checking NPT and BSPT pipe sizes, use the two included gauges for measuring thread pitch.
| For Thread Type | For Pipe Size | For Gender | Wd. | Ht. | Thick. | Thread Size Identifier Material | Thread Pitch Identifier Material | Color | Each | |
| BSPT, NPT | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | Female, Male | 9" | 4 1/4" | 1/4" | Plastic | Steel | Blue | 000000 | 00000 |
Pipe Thread Identifiers
Check external NPT thread size and taper.
| For Thread Type | For Thread Location | For Pipe Size | Wd. | Ht. | Thick. | Color | Each | |
Aluminum | ||||||||
|---|---|---|---|---|---|---|---|---|
| NPT | External | 1/16, 1/8, 1/4, 3/8, 1/2 | 2" | 3" | 1/4" | Blue | 000000 | 000000 |
Pipe, Tubing, and Hose Size Identifiers
For Pipe, Tubing, And Hose
For Pipe, Pipe Fittings, And Hose
Determine pipe size and inner and outer diameter.
Pipe, pipe fittings, and hose identifier is stainless steel for corrosion resistance.
| For Use With | For Pipe Size | For Pipe Fitting Size | For Tube OD | For Hose ID | Includes | Wd. | Ht. | Thick. | Color | Each | |
Plastic | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe, Tubing, Hose | 1/8, 1/4, 3/8, 1/2, 3/4 | __ | 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 5/8", 3/4", 1" | 1/4", 3/8", 1/2", 3/4", 1" | Compression Fitting Chart | 9" | 3 3/4" | 7/64" | Blue | 0000000 | 00000 |
Stainless Steel | |||||||||||
| Pipe, Pipe Fittings, Hose | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2 | __ | 1/8", 1/4", 5/16", 3/8", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4" | __ | 3 3/4" | 4 1/2" | 1/32" | Silver | 00000000 | 00000 |
Thread Identifier Sets
Set includes calipers and gauges to identify external and internal threads.
Container | |||||||
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| For Use With | For Thread Type | For Thread Location | Type | Material | Includes | Each | |
Inch, Metric, Pipe Size | |||||||
Steel | |||||||
| Screws, Bolts, Threaded Rods, Nuts, Pipe | NPT, UNC, UNF, BSPT, BSPP, Metric | External/Internal | Folding Case | Plastic | Caliper, Instruction Book, Two Steel Angle Gauges, Two Steel Gauges | 000000 | 000000 |