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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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Brass Nylon-Insert Locknuts
These locknuts are corrosion resistant in wet environments, electrically conductive, and 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. | |
Brass | ||||||
|---|---|---|---|---|---|---|
| 4-40 | 1/4" | 9/64" | 220° | 50 | 000000000 | 00000 |
| 6-32 | 5/16" | 11/64" | 220° | 25 | 000000000 | 0000 |
| 8-32 | 11/32" | 15/64" | 220° | 25 | 000000000 | 0000 |
| 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° | 10 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 11/32" | 220° | 10 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 29/64" | 220° | 5 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 19/32" | 220° | 1 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 3/4" | 220° | 1 | 000000000 | 00000 |
| 3/4"-10 | 1 1/16" | 7/8" | 220° | 1 | 000000000 | 00000 |
Brass Serrated Flange Locknuts
Made from brass, these flange locknuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. They’re easy to install and resist mild vibration since serrations grip the material surface instead of the threads. The flange distributes pressure on the material surface, so you don’t need a separate washer. Height includes the flange.
For technical drawings and 3-D models, click on a part number.
Brass Hex Panel Nuts
These panel nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. They can be fastened with a wrench for more torque while tightening than knurled panel nuts. Also known as dress nuts, they're extremely thin for use in tight spaces such as electrical panels.
Nickel-plated brass panel nuts have excellent resistance to chemicals and salt water.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Brass | |||||
|---|---|---|---|---|---|
| 1/4"-32 | 5/16" | 5/64" | 10 | 000000000 | 00000 |
| 1/4"-32 | 3/8" | 3/32" | 10 | 000000000 | 0000 |
| 5/16"-32 | 7/16" | 7/64" | 10 | 000000000 | 0000 |
| 3/8"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 7/16"-28 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
Nickel-Plated Brass | |||||
| 1/4"-32 | 5/16" | 5/64" | 10 | 000000000 | 0000 |
| 1/4"-32 | 3/8" | 3/32" | 10 | 000000000 | 0000 |
| 5/16"-32 | 7/16" | 7/64" | 10 | 000000000 | 0000 |
| 3/8"-32 | 1/2" | 3/32" | 10 | 000000000 | 0000 |
| 7/16"-28 | 5/8" | 3/32" | 1 | 000000000 | 0000 |
| 15/32"-32 | 9/16" | 5/64" | 10 | 000000000 | 0000 |
| 15/32"-32 | 9/16" | 3/32" | 10 | 000000000 | 0000 |
| 1/2"-28 | 5/8" | 1/8" | 10 | 000000000 | 0000 |
Brass Sealing Hex Nuts
These nickel-plated brass sealing nuts have good resistance to chemicals and salt water. A nickel plating provides additional corrosion resistance and a decorative metallic finish. They have a silicone seal that prevents leaks and seals out contaminants. All meet UL 50 for use on enclosures. Nuts are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Max. Pressure | Seal Temp. Range, °F | Specifications Met | Each | |
Nickel-Plated Brass | |||||||
|---|---|---|---|---|---|---|---|
| 6-32 | 1/2" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 00000 |
| 8-32 | 1/2" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 0000 |
| 10-24 | 1/2" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 0000 |
| 10-32 | 1/2" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 0000 |
| 1/4"-28 | 5/8" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 0000 |
| 3/8"-24 | 5/8" | 7/32" | 6,000 psi | -100° to 400° | UL 50 | 000000000 | 0000 |
Locknuts for Metal Conduit Fittings
Secure threaded metal conduit fittings to a knockout in an outlet box or enclosure.
For technical drawings and 3-D models, click on a part number.
High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
For technical drawings and 3-D models, click on a part number.
Low-Pressure Plated Brass Threaded Pipe Fittings
Used in low-pressure pipe lines, these brass fittings have a plating that makes them shiny and improves corrosion resistance.
Chrome-plated brass fittings are shinier and withstand corrosion better than nickel-plated brass fittings.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 125
- Specifications Met: ASTM B456
- Pipe Nipples and Pipe: Use Schedule 40 brass
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | ||||
|---|---|---|---|---|
Chrome-Plated Brass | ||||
| 1/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 000000 |
| 1/4 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 3/8 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 1/2 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 3/4 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
| 1 | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
Low-Pressure Brass and Bronze Threaded Pipe Fittings
Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration. Locknuts that meet DIN 431 adhere to international standards for locknut dimensions.
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: See table
- Pressure Class: See table
- Specifications Met: See table
- Pipe Nipples and Pipe: See table
- Flanges: See table
For Pipe | For Flange | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Pressure Class | Material | Schedule | Material | Class | Material | For Use With | Specifications Met | Each | |
NPSL Female | |||||||||||
| 1/8 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
| 1/4 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
| 3/8 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
| 1/2 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
| 3/4 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
| 1 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
| 1 1/4 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
| 1 1/2 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
| 2 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Drinking Water, Natural Gas, Oil | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
| 2 1/2 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Natural Gas, Oil | ASME B16.15 | 00000000 | 00000 |
| 3 | 200 psi @ 72° F | 125 | Brass | 40 | Brass | 150 | Brass | Air, Natural Gas, Oil | ASME B16.15 | 00000000 | 00000 |
BSPP Female | |||||||||||
| 1/8 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 1/4 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 3/8 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 1/2 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 3/4 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 0000 |
| 1 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 00000 |
| 1 1/4 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 00000 |
| 1 1/2 | Not Rated | __ | Brass | __ | Brass | __ | Brass | Air, Natural Gas, Oil | DIN 431 | 0000000 | 00000 |