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About Pipe and Fittings
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Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Low-Pressure Galvanized Iron and Steel Threaded Pipe Locknuts
 |
The galvanized finish on these locknuts provides fair corrosion resistance. Locknuts are for use in low-pressure applications.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
NPSL Thread—NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For Pipe | For Flange | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Hex Wd. | Lg. | Max. Pressure @ Temp. | Max. Steam Pressure @ Temp. | For Use With | Pressure Class | Material | Schedule | Material | Class | Material | Specs. Met | Each | |||
NPSL Female | ||||||||||||||||
| 1/4 | 27/32" | 1/4" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K612 | 00000 | ||
| 3/8 | 1" | 0.28" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K613 | 0000 | ||
| 1/2 | 1 3/16" | 0.31" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K614 | 0000 | ||
| 3/4 | 1 7/16" | 0.34" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K615 | 0000 | ||
| 1 | 1 3/4" | 0.38" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K616 | 00000 | ||
| 1 1/4 | 2 3/32" | 0.42" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K617 | 00000 | ||
| 1 1/2 | 2 11/32" | 0.47" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K618 | 00000 | ||
| 2 | 2 7/8" | 0.53" | Not Rated | Not Rated | Air, Natural Gas, Oil, Steam, Water | 150 | Galvanized Iron | 40 | Galvanized Steel | 150 | Galvanized Steel | ASME B16.14 | 4638K619 | 00000 | ||
