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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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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.
Threaded female x butt weld straight adapters are also known as half couplings.
Straight Adapters
- For Use With: Air, Oil, Water
- Specifications Met: See table
- Pressure Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
Pipe Size | Max. Pressure | Specifications Met | Each | |
NPT Female × Butt Weld | ||||
|---|---|---|---|---|
| 1/8 | 150 psi @ 72° F | ASME B1.20.1, ASTM B221 | 000000000 | 00000 |
| 1/4 | 150 psi @ 72° F | ASME B1.20.1, ASTM B221 | 000000000 | 0000 |
| 3/8 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 0000 |
| 1/2 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 0000 |
| 3/4 | 150 psi @ 72° F | ASME B1.20.1, ASTM B221 | 000000000 | 0000 |
| 1 | 150 psi @ 72° F | ASME B1.20.1, ASTM B221 | 000000000 | 0000 |
| 1 1/4 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 0000 |
| 1 1/2 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 0000 |
| 2 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | ASME B1.20.1, ASTM B221 | 000000000 | 00000 |
| 3 | 150 psi @ 72° F | ASME B1.20.1, ASTM B221 | 000000000 | 00000 |
| 4 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 00000 |
| 6 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 000000 |
High-Pressure Aluminum Threaded Pipe Fittings
Also known as Pressure Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer. They are lightweight with good corrosion resistance.
Threaded female x butt weld straight adapters are also known as half couplings.
Straight Adapters
- For Use With: Air, Water
- Pressure Class : 3000
- Specifications Met: Fed. Spec. QQ-A-200/8, ASTM B221, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 80 aluminum