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.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Pressure Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
Pipe Size | Max. Pressure | Each | |
NPT Female × NPT Male | |||
|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 000000000 | 000000 |
| 1/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 000000000 | 00000 |
| 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 150 psi @ 72° F | 00000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 000000000 | 000000 |
| 3 | 150 psi @ 72° F | 000000000 | 000000 |
| 4 | 150 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Oil, Water
- Specifications Met: ASME B1.20.1, MIL-DTL-52618
- Pressure Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
Pipe Size | ||||
|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Each | |
NPT Female | ||||
| 1/2 | 1/4 | 150 psi @ 72° F | 000000000 | 000000 |
| 1/2 | 3/8 | 150 psi @ 72° F | 000000000 | 00000 |
| 3/4 | 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 | 3/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/4 | 1 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 1 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 1 1/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 1 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 2 | 150 psi @ 72° F | 000000000 | 000000 |
| 4 | 3 | 150 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Oil, Water
- Specifications Met: ASME B1.20.1, MIL-DTL-52618
- Pressure Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
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.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
Medium-Pressure Aluminum Threaded Pipe Fittings
Designed for medium-pressure applications, these fittings have better strength than our low-pressure aluminum pipe fittings. They are lightweight with good corrosion resistance.
Fittings with blue anodized finish have better corrosion resistance and a harder surface than plain aluminum fittings.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Pipe Nipples and Pipe:
BSPT: Use Schedule 40 aluminum
| Pipe Size | Max. Pressure | Color | Finish | Each | |
NPT Female × NPT Male | |||||
|---|---|---|---|---|---|
| 1/4 | 500 psi @ 72° F | Blue | Anodized | 0000000 | 000000 |
| 3/8 | 500 psi @ 72° F | Blue | Anodized | 0000000 | 00000 |
| 1/2 | 500 psi @ 72° F | Blue | Anodized | 0000000 | 00000 |
BSPT Female × BSPT Male | |||||
| 1/8 | 250 psi @ 72° F | __ | __ | 0000000 | 00000 |
| 1/4 | 250 psi @ 72° F | __ | __ | 0000000 | 00000 |
| 3/8 | 250 psi @ 72° F | __ | __ | 0000000 | 00000 |
| 1/2 | 250 psi @ 72° F | __ | __ | 0000000 | 00000 |
| 3/4 | 250 psi @ 72° F | __ | __ | 0000000 | 00000 |
| 1 | 250 psi @ 72° F | __ | __ | 0000000 | 00000 |
Aluminum Quick-Connect Pipe Fittings for Compressed Air
Twist these fittings onto aluminum pipe for quick, sealed connections—no threading, soldering, or welding necessary. Use them to build a compressed air system in half the time it would take to build a copper or steel system. Also known as Unipipe fittings, they’re part of a quick-connect system that’s compatible with pipe from Unipipe, Transair, and Infinity.
Finger tighten the collar on the end of these fittings, then use a wrench for the final quarter turn. The inside of these fittings has a compression ring and O-ring to seal against the pipe. They’re easy to take apart as needed to modify your setup.
Choose fittings with a blue or gray collar for easy identification. Fittings with a blue collar are often used for compressed air systems. Fittings with a gray collar are often used for vacuum systems.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Coolant, Nitrogen, Oil
- Temperature Range: 0° to 210° F
- Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
Threaded connections can be taken apart as needed for maintenance and repair.
(A) | |||||||
|---|---|---|---|---|---|---|---|
| For Pipe OD | Socket Dp., mm | Pipe Size (B) | Material | Color | Max. Pressure | Each | |
Blue Collar | |||||||
NPT Threads | |||||||
| 3/4" (20 mm) | 35 | 1/2 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 0000000 | 000000 |
| 1" (25 mm) | 37 | 1/2 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 0000000 | 00000 |
| 1" (25 mm) | 37 | 3/4 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 0000000 | 00000 |
| 1 1/2" (40 mm) | 57 | 1 1/4 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 0000000 | 00000 |
| 1 1/2" (40 mm) | 57 | 2 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 0000000 | 00000 |
Gray Collar | |||||||
NPT Threads | |||||||
| 3/4" (20 mm) | 35 | 1/2 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 00000000 | 00000 |
| 1" (25 mm) | 37 | 1/2 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 00000000 | 00000 |
| 1" (25 mm) | 37 | 3/4 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 00000000 | 00000 |
| 1 1/2" (40 mm) | 57 | 1 1/4 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 00000000 | 00000 |
| 1 1/2" (40 mm) | 57 | 2 | Epoxy-Coated 6061 Aluminum | Black | 230 psi @ 72° F | 00000000 | 00000 |
Use measuring tools to mark your pipe’s proper insertion depth so you know if it’s inserted far enough into the fitting.
| Max. Dp. Measured, mm | Lg., mm | Wd., mm | Material | Each | |
| 160 | 224 | 39 | Plastic | 0000000 | 000000 |
Threaded Swivel Hose Fittings for Air
Designed for pneumatic applications, these fittings swivel 360° before and after installation as needed to prevent kinking between hose and portable air tools. Elbows with two swivels rotate on two axes. They allow the hose to remain vertical no matter how you position your tool, which reduces operator fatigue. Aluminum fittings are lighter in weight than other metal fittings. They have good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 150 psi @ 72° F
- Temperature Range: -20° to 200° F
Pipe Size | Thread Material | Open Flow | |||||
|---|---|---|---|---|---|---|---|
| No. of Swivels | (A) | (B) | Thread Type | Female End | Male End | Each | |
Aluminum | |||||||
| 2 | 1/4 | 1/8 | NPT | Aluminum | Steel | 00000000 | 000000 |