Material Material | Show |
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System of Measurement System of Measurement |
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Nut Type Nut Type |
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 |  |
| Hex | Locknut |
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| Tamper Resistant |
Locking Type Locking Type |
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| Nylon Insert | Serrations |
Hex Nut Profile Hex Nut Profile |
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 | Standard |
Thread Direction Thread Direction |
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 | Right Hand |
Thread Fit Thread Fit |
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Drive Style Drive Style |
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| External Hex | Serrated Edge |
Insert Maximum Temperature Insert Maximum Temperature |
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For Pipe Material For Pipe Material |
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Class Class |
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Diameter Diameter |
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Maximum Pressure Maximum Pressure |
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For Pipe Schedule For Pipe Schedule |
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 | 40 |
About Nuts, Materials, and Finishes
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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Aluminum Nylon-Insert Locknuts
One-third the weight of steel, aluminum nuts resist corrosion in wet environments and are nonmagnetic. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
6061 Aluminum | ||||||
|---|---|---|---|---|---|---|
| 8-32 | 11/32" | 15/64" | 220° | 25 | 000000000 | 00000 |
| 10-24 | 3/8" | 15/64" | 220° | 25 | 000000000 | 0000 |
| 10-32 | 3/8" | 15/64" | 220° | 25 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 5/16" | 220° | 25 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 11/32" | 220° | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 29/64" | 220° | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 19/32" | 220° | 5 | 000000000 | 0000 |
Tamper-Resistant Serrated-Edge Locknuts
These nuts have serrations that dig into the material surface to resist loosening and are narrow to fit in tight spaces. They must be installed with a serrated-edge driver (sold separately). Use them to reduce the risk of unwanted removal for objects in public spaces such as signs, lighting fixtures, and displays. Made from aluminum, they're lightweight, corrosion resistant in wet evironments, and nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Low-Pressure Aluminum Threaded Pipe Fittings
In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Max. Pressure | Each | |
NPSL Female | |||
|---|---|---|---|
| 1/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 1/2 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 150 psi @ 72° F | 000000000 | 00000 |