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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Standard-Wall Butt-Weld Aluminum
Unthreaded Pipe Fittings
Also known as Schedule 40 fittings, these have thicker walls than our thin-wall aluminum unthreaded pipe fittings. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow. Fittings are lightweight with good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Specifications Met: ANSI/ASME B16.9
- Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
- For Use With: Air, Oil, Water
- Specifications Met: ANSI/ASME B16.9
- Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Wall Thick. | Construction | Each | |
| 1/2 | 0.109" | Seamless | 000000000 | 000000 |
| 3/4 | 0.113" | Seamless | 000000000 | 00000 |
| 1 | 0.133" | Seamless | 000000000 | 00000 |
| 1 1/4 | 0.14" | Seamless | 000000000 | 00000 |
| 1 1/2 | 0.145" | Seamless | 000000000 | 00000 |
| 2 | 0.154" | Seamless | 000000000 | 00000 |
| 2 1/2 | 0.203" | Seamless | 000000000 | 00000 |
| 3 | 0.216" | Seamless | 000000000 | 00000 |
| 4 | 0.237" | Seamless | 000000000 | 000000 |
- For Use With: Air, Oil, Water
- Specifications Met: ANSI/ASME B16.9
- Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Wall Thick. | Construction | Each | |
| 1/2 | 0.109" | Seamless | 000000000 | 000000 |
| 3/4 | 0.113" | Seamless | 000000000 | 00000 |
| 1 | 0.133" | Seamless | 000000000 | 00000 |
| 1 1/4 | 0.14" | Seamless | 000000000 | 00000 |
| 1 1/2 | 0.145" | Seamless | 000000000 | 00000 |
| 2 | 0.154" | Seamless | 000000000 | 00000 |
| 2 1/2 | 0.203" | Seamless | 000000000 | 000000 |
| 3 | 0.216" | Seamless | 000000000 | 00000 |
| 4 | 0.237" | Seamless | 000000000 | 000000 |
- For Use With: Air, Oil, Water
- Specifications Met: ANSI/ASME B16.9
- Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Wall Thick. | Construction | Each | |
| 1/2 | 0.109" | Seamless | 000000000 | 0000000 |
| 3/4 | 0.113" | Seamless | 000000000 | 000000 |
| 1 | 0.133" | Seamless | 000000000 | 000000 |
| 1 1/4 | 0.14" | Seamless | 000000000 | 000000 |
| 1 1/2 | 0.145" | Seamless | 000000000 | 000000 |
| 2 | 0.154" | Seamless | 000000000 | 000000 |
| 2 1/2 | 0.203" | Seamless | 000000000 | 000000 |
| 3 | 0.216" | Seamless | 000000000 | 000000 |
| 4 | 0.237" | Seamless | 000000000 | 000000 |
- For Use With: Air, Oil, Water
- Specifications Met: ANSI/ASME B16.9
- Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Wall Thick. | Construction | Each | |
| 1/2 | 0.109" | Seamless | 000000000 | 0000000 |
| 3/4 | 0.113" | Seamless | 000000000 | 000000 |
| 1 | 0.133" | Seamless | 000000000 | 000000 |
| 1 1/4 | 0.14" | Seamless | 000000000 | 000000 |
| 1 1/2 | 0.145" | Seamless | 000000000 | 000000 |
| 2 | 0.154" | Seamless | 000000000 | 000000 |
| 2 1/2 | 0.203" | Seamless | 000000000 | 000000 |
| 3 | 0.216" | Seamless | 000000000 | 000000 |
| 4 | 0.237" | Seamless | 000000000 | 000000 |
Standard-Wall Aluminum Unthreaded Pipe
- For Use With: Air, Oil, Water
- Specifications Met: ASTM B241
- Fittings: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
With a thicker wall than our thin-wall aluminum pipe, this pipe is also known as Schedule 40. Weld it to fittings and additional lengths of pipe. Welded connections are stronger than threaded connections and less likely to leak. Pipe is aluminum, which is lightweight with good corrosion resistance.
Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe. Welded pipe has a weld bead on the inside.
For technical drawings and 3-D models, click on a part number.
| Lg., ft. | Wall Thick. | Construction | Each | |
1/8 Pipe Size | ||||
|---|---|---|---|---|
| 1 | 0.068" | Seamless | 00000000 | 00000 |
| 3 | 0.068" | Seamless | 0000000 | 00000 |
| 6 | 0.068" | Seamless | 0000000 | 00000 |
1/4 Pipe Size | ||||
| 1 | 0.088" | Seamless | 00000000 | 0000 |
| 3 | 0.088" | Seamless | 0000000 | 00000 |
| 6 | 0.088" | Seamless | 0000000 | 00000 |
3/8 Pipe Size | ||||
| 1 | 0.091" | Seamless | 00000000 | 00000 |
| 3 | 0.091" | Seamless | 0000000 | 00000 |
| 6 | 0.091" | Seamless | 0000000 | 00000 |
1/2 Pipe Size | ||||
| 1 | 0.109" | Seamless | 00000000 | 00000 |
| 3 | 0.109" | Seamless | 0000000 | 00000 |
| 6 | 0.109" | Seamless | 0000000 | 00000 |
3/4 Pipe Size | ||||
| 1 | 0.113" | Seamless | 00000000 | 00000 |
| 3 | 0.113" | Seamless | 0000000 | 00000 |
| 6 | 0.113" | Seamless | 0000000 | 00000 |
1 Pipe Size | ||||
| 1 | 0.133" | Seamless | 00000000 | 00000 |
| 3 | 0.133" | Seamless | 0000000 | 00000 |
| 6 | 0.133" | Seamless | 0000000 | 00000 |
1 1/4 Pipe Size | ||||
| 1 | 0.14" | Seamless | 00000000 | 00000 |
| 3 | 0.14" | Seamless | 0000000 | 00000 |
| 6 | 0.14" | Seamless | 0000000 | 000000 |
1 1/2 Pipe Size | ||||
| 1 | 0.145" | Seamless | 00000000 | 00000 |
| 3 | 0.145" | Seamless | 0000000 | 00000 |
| 6 | 0.145" | Seamless | 0000000 | 000000 |
2 Pipe Size | ||||
| 1 | 0.154" | Seamless | 00000000 | 00000 |
| 3 | 0.154" | Seamless | 0000000 | 00000 |
| 6 | 0.154" | Seamless | 0000000 | 000000 |
2 1/2 Pipe Size | ||||
| 1 | 0.203" | Seamless | 00000000 | 00000 |
| 3 | 0.203" | Seamless | 0000000 | 000000 |
| 6 | 0.203" | Seamless | 0000000 | 000000 |
3 Pipe Size | ||||
| 1 | 0.216" | Seamless | 00000000 | 00000 |
| 3 | 0.216" | Seamless | 0000000 | 000000 |
| 6 | 0.216" | Seamless | 0000000 | 000000 |
4 Pipe Size | ||||
| 1 | 0.237" | Seamless | 00000000 | 000000 |
| 3 | 0.237" | Seamless | 0000000 | 000000 |
| 6 | 0.237" | Seamless | 0000000 | 000000 |
6 Pipe Size | ||||
| 1 | 0.28" | Welded | 00000000 | 000000 |
| 3 | 0.28" | Welded | 00000000 | 000000 |
| 6 | 0.28" | Welded | 00000000 | 00000000 |
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.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Specifications Met: MIL-DTL-52618E, ANSI/ASME B1.20.1
- Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Max. Pressure | Each | |
NPT Female × Butt Weld | |||
|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 000000000 | 00000 |
| 1/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 1/2 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/4 | 150 psi @ 72° F | 00000000 | 0000 |
| 1 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 1/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 1/2 | 150 psi @ 72° F | 000000000 | 0000 |
| 2 | 150 psi @ 72° F | 000000000 | 0000 |
| 2 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 150 psi @ 72° F | 000000000 | 00000 |
| 4 | 150 psi @ 72° F | 000000000 | 00000 |
| 6 | 150 psi @ 72° F | 000000000 | 000000 |