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.
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: ASTM A197, UL Listed, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size  | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 2 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 3 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
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.
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, ASME B16.11, ASTM A105, ASTM B633
- Pipe Nipples and Pipe: Use Schedule 160 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 02 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 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 | 000000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576