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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Extreme-Pressure Stainless Steel Threaded Pipe Fittings
With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.
303 stainless steel fittings have very good corrosion resistance.
Locknuts have a gasket, which creates a tight seal without the need for PTFE tape; screw one onto the male end of a fitting for extra holding power.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Water
- Temperature Range: -300° to 500° F
303 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Hex Wd. | Lg. | Gasket Material | Max. Pressure | Each | |
NPT Female | |||||||
1/8 | 02 | 5/8" | 3/16" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 000000 |
1/4 | 04 | 3/4" | 9/32" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 00000 |
3/8 | 06 | 7/8" | 9/32" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 00000 |
1/2 | 08 | 1 1/8" | 19/64" | PTFE Plastic | 10,000 psi @ 72° F | 0000000 | 00000 |
3/4 | 12 | 1 5/16" | 19/64" | PTFE Plastic | 5,000 psi @ 72° F | 0000000 | 000000 |
1 | 16 | 1 5/8" | 25/64" | PTFE Plastic | 5,000 psi @ 72° F | 0000000 | 000000 |
1 1/4 | 20 | 2" | 25/64" | PTFE Plastic | 5,000 psi @ 72° F | 0000000 | 000000 |
1 1/2 | 24 | 2 1/4" | 25/64" | PTFE Plastic | 3,000 psi @ 72° F | 0000000 | 000000 |
2 | 32 | 2 3/4" | 27/64" | PTFE Plastic | 3,000 psi @ 72° F | 0000000 | 000000 |
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
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:
NPT: 125
NPSL: 150 - Specifications Met:
NPT: ASME B1.20.1, ASME B16.4
NPSL: ASME B16.14
BSPP: DIN 431 - Pipe Nipples and Pipe:
NPT, NPSL: Use Schedule 40 steel
Pipe Size | Material | Each | |
NPT Female | |||
---|---|---|---|
3 | Iron | 000000000 | 000000 |
Extreme-Pressure Steel Threaded Pipe Fittings
The strongest steel fittings we offer, these can withstand extreme-pressure applications.
Galvanized and zinc-plated steel fittings have better corrosion resistance than plain steel fittings. PTFE-coated steel fittings have better corrosion resistance than galvanized and zinc-plated steel 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, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Temperature Range: -100° to 500° F
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use Class 1500 steel
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | ||||||
---|---|---|---|---|---|---|
1/8 | 02 | 10,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 000000 |
1/4 | 04 | 10,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
3/8 | 06 | 10,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
1/2 | 08 | 10,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
3/4 | 12 | 5,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
1 | 16 | 5,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
1 1/4 | 20 | 5,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
1 1/2 | 24 | 3,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 00000 |
2 | 32 | 3,000 psi @ 72° F | 5,000 psi @ 500° F | Galvanized Steel | 0000000 | 000000 |
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 |
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.
Locknuts for Plastic Conduit Fittings
Secure threaded plastic conduit fittings to a knockout in an outlet box or enclosure.
For technical drawings and 3-D models, click on a part number.