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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.
Adapters for tanks weld onto the surface of any tank, pressure vessel, or drum to create a permanent inlet or outlet connection. Adapters with extended lip fit tightly into the hole, which keeps the fitting steady during welding.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
Straight Adapters with Extension for Flat Tanks
- For Use With: Water, Oil, Gasoline, Diesel Fuel
- Specifications Met: ASTM B221
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Pipe Size | For Hole Dia. | OD | Lg. | Each | |
NPT Female × Weld | |||||
|---|---|---|---|---|---|
| 1/8 | 7/8" | 1 5/16" | 1/4" | 0000000 | 00000 |
| 1/4 | 7/8" | 1 5/16" | 1/4" | 0000000 | 00000 |
| 3/8 | 1 3/16" | 1 7/16" | 1/4" | 0000000 | 00000 |
| 1/2 | 1 1/8" | 1 5/8" | 1/4" | 0000000 | 00000 |
| 3/4 | 1 5/16" | 2" | 1/4" | 0000000 | 00000 |
| 1 | 1 11/16" | 2 1/4" | 1/4" | 0000000 | 00000 |
| 1 1/4 | 1 15/16" | 2 9/16" | 5/16" | 0000000 | 00000 |
| 1 1/2 | 2 1/4" | 2 15/16" | 5/16" | 0000000 | 00000 |
| 2 | 2 5/8" | 3 3/8" | 5/16" | 0000000 | 00000 |
| 3 | 3 11/16" | 4 5/8" | 3/4" | 0000000 | 000000 |
| 4 | 4 3/4" | 5 13/16" | 7/8" | 0000000 | 000000 |
