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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Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.
Union connectors separate so you can access your line without unthreading pipe connections. They have a brass gasket that creates a tight seal.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size  | Max. Pressure | Max. Steam Pressure | Material | Gasket Material | Specifications Met | Each | |
NPT Female | |||||||
|---|---|---|---|---|---|---|---|
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197 | 00000000 | 000000 |
| 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 3/8 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 3/4 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 1 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 1 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197, UL Listed | 00000000 | 00000 |
| 2 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197 | 00000000 | 000000 |
| 3 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197 | 00000000 | 000000 |
| 4 | 300 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | Brass | ASME B1.20.1, ASME B16.39, ASTM A197 | 00000000 | 000000 |
BSPT Female | |||||||
| 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
| 1 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | Brass | ASTM A197, DIN EN 10226 | 00000000 | 00000 |
High-Pressure Galvanized Steel Threaded Pipe Fittings
A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Pressure Class 3000 fittings, they have excellent strength to handle high-pressure applications.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASME B1.20.1, ASTM A105, ASTM B633, MSS SP-83
- Pipe Nipples and Pipe: Use Schedule 160 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
A galvanized finish gives these fittings fair corrosion resistance. They have the strength to handle medium-pressure applications.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Steam, Water
- Pressure Class : 300
- Specifications Met: FM Approved, UL Listed, ASTM A197, ASTM A153, ASME B1.20.1, ASME B16.39
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/4 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 000000 |
| 3/8 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1/2 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 3/4 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1 1/4 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1 1/2 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 0000000 | 000000 |
| 2 | 600 psi @ 72° F | 230 psi @ 550° F | Galvanized Iron | 000000 | 000000 |
Medium-Pressure Pipe Fittings for Joining Dissimilar Metals
Use these unions to connect different metals in a piping or plumbing system. They have a plastic sleeve that inhibits destructive corrosion. Use them for connections that must be electrically insulated. Unions separate into three pieces for access to your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Oil, Natural Gas
- Max.Temperature: 180° F