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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.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Specifications Met:
NPT: ANSI/ASME B1.20.1, MIL-DTL-52618E - Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
Pipe Size | ||||
|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Each | |
NPT Male × NPT Female | ||||
| 1/4 | 1/8 | 150 psi @ 72° F | 000000000 | 00000 |
| 3/8 | 1/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/8 | 1/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1/2 | 1/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 1/2 | 1/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1/2 | 3/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/4 | 1/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/4 | 3/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 3/4 | 1/2 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 | 1/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 | 3/8 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 | 1/2 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 | 3/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 1/4 | 1/2 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 1/4 | 3/4 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 1/4 | 1 | 150 psi @ 72° F | 000000000 | 0000 |
| 1 1/2 | 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 3/4 | 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 | 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 3/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 1 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 1 1/4 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 | 1 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 1 | 150 psi @ 72° F | 000000000 | 00000 |
| 2 1/2 | 2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 1 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 2 | 150 psi @ 72° F | 000000000 | 00000 |
| 3 | 2 1/2 | 150 psi @ 72° F | 000000000 | 00000 |
| 4 | 2 | 150 psi @ 72° F | 000000000 | 00000 |
| 4 | 3 | 150 psi @ 72° F | 000000000 | 00000 |
| 6 | 3 | 150 psi @ 72° F | 000000000 | 000000 |
| 6 | 4 | 150 psi @ 72° F | 000000000 | 000000 |
BSPT Male × BSPT Female | ||||
| 1/4 | 1/8 | 150 psi @ 72° F | 0000000 | 0000 |
| 3/8 | 1/4 | 150 psi @ 72° F | 0000000 | 0000 |
| 1/2 | 1/4 | 150 psi @ 72° F | 0000000 | 0000 |
| 1/2 | 3/8 | 150 psi @ 72° F | 0000000 | 0000 |
| 3/4 | 1/2 | 150 psi @ 72° F | 0000000 | 00000 |
| 1 | 3/4 | 150 psi @ 72° F | 0000000 | 00000 |
| 1 1/2 | 1 | 150 psi @ 72° F | 0000000 | 00000 |
| 2 | 1 1/2 | 150 psi @ 72° F | 0000000 | 00000 |
High-Pressure Aluminum Threaded Pipe Fittings
Also known as Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer. They are lightweight with good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Class: 3000
- Specifications Met: ANSI/ASME B1.20.1, Fed. Spec. QQ-A-200/8, ASTM B221, ANSI/ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 80 aluminum
Miniature Medium-Pressure
Aluminum Threaded Pipe Fittings
Their small size makes these miniature fittings a good choice for cramped, confined spaces. They are designed to handle medium-pressure applications. Fittings are aluminum, which is 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: ASTM B241, ANSI/ASME B1.20.1
| Pipe Size (A) | Pipe Size (B) | Thread Size (B) | Max. Pressure | Each | |
NPT Male × NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 1/16 | __ | 150 psi @ 72° F | 00000000 | 00000 |
| 1/4 | 1/16 | __ | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | 1/8 | __ | 150 psi @ 72° F | 00000000 | 0000 |
NPT Male × UN/UNF (SAE) Female | |||||
| 1/16 | __ | 10-32 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | __ | 10-32 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | __ | 1/4"-28 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | 10-32 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | 1/4"-28 | 150 psi @ 72° F | 00000000 | 0000 |
NPT Male × Metric Female | |||||
| 1/16 | __ | M3 × 0.5 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/16 | __ | M5 × 0.8 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | __ | M3 × 0.5 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | __ | M5 × 0.8 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | __ | M6 × 1 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | __ | M8 × 1 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | M3 × 0.5 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | M5 × 0.8 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | M6 × 1 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | M8 × 1 mm | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | __ | M10 × 1.25 mm | 150 psi @ 72° F | 00000000 | 00000 |