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About Pipe and Fittings
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Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Adapters for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum. Adapters with weld end allow for a permanent connection. Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
Straight Adapters with Extension for Flat Tanks
- For Use With: Diesel Fuel, Gasoline, Oil, Water
- Specifications Met: ASTM A181, ASME B1.20.1
Pipe Size | For Hole Dia. | OD | Lg. | Material | Each | |
NPT Female × Weld | ||||||
|---|---|---|---|---|---|---|
| 1/8 | 15/16" | 1 5/16" | 3/8" | Carbon Steel | 12555K79 | 00000 |
| 1/8 | 15/16" | 1 1/2" | 9/16" | Carbon Steel | 12555K69 | 0000 |
| 1/4 | 15/16" | 1 5/16" | 3/8" | Carbon Steel | 12555K81 | 0000 |
| 1/4 | 15/16" | 1 1/2" | 9/16" | Carbon Steel | 12555K71 | 0000 |
| 3/8 | 15/16" | 1 5/16" | 3/8" | Carbon Steel | 12555K82 | 0000 |
| 3/8 | 15/16" | 1 1/2" | 9/16" | Carbon Steel | 12555K72 | 0000 |
| 1/2 | 1 1/8" | 1 5/8" | 7/16" | Carbon Steel | 12555K83 | 0000 |
| 1/2 | 1 1/8" | 1 3/4" | 5/8" | Carbon Steel | 12555K73 | 0000 |
| 3/4 | 1 5/16" | 1 15/16" | 1/2" | Carbon Steel | 12555K84 | 0000 |
| 3/4 | 1 3/8" | 2 1/8" | 11/16" | Carbon Steel | 12555K74 | 0000 |
| 1 | 1 5/8" | 2 3/8" | 3/4" | Carbon Steel | 12555K75 | 0000 |
| 1 | 1 11/16" | 2 1/4" | 9/16" | Carbon Steel | 12555K85 | 0000 |
| 1 1/4 | 2" | 2 9/16" | 9/16" | Carbon Steel | 12555K86 | 00000 |
| 1 1/4 | 2" | 2 11/16" | 3/4" | Carbon Steel | 12555K76 | 0000 |
| 1 1/2 | 2 1/4" | 2 13/16" | 9/16" | Carbon Steel | 12555K87 | 0000 |
| 1 1/2 | 2 1/4" | 3" | 3/4" | Carbon Steel | 12555K77 | 0000 |
| 2 | 2 5/8" | 3 3/8" | 5/8" | Carbon Steel | 12555K88 | 0000 |
| 2 | 2 5/8" | 3 1/2" | 27/32" | Carbon Steel | 12555K78 | 00000 |
| 2 1/2 | 3 1/8" | 4 1/16" | 1" | Carbon Steel | 12555K89 | 00000 |
| 3 | 3 5/8" | 4 5/8" | 1" | Carbon Steel | 12555K91 | 00000 |
| 4 | 4 11/16" | 5 13/16" | 1 7/32" | Carbon Steel | 12555K92 | 00000 |
Straight Adapters for Flat Tanks
- For Use With: Diesel Fuel, Gasoline, Oil, Water
- Specifications Met: ASTM A105, ASTM A181
| Pipe Size | For Hole Dia. | OD | Lg. | Material | Each | |
NPT Female × Weld | ||||||
|---|---|---|---|---|---|---|
| 1/4 | 3/4" | 1 1/4" | 5/16" | Carbon Steel | 12555K51 | 00000 |
| 3/8 | 15/16" | 1 1/4" | 3/8" | Carbon Steel | 12555K52 | 00000 |
| 1/2 | 1 1/8" | 1 1/2" | 1/2" | Carbon Steel | 12555K53 | 0000 |
| 3/4 | 1 3/8" | 1 3/4" | 5/8" | Carbon Steel | 12555K54 | 0000 |
| 1 | 1 11/16" | 2 1/8" | 5/8" | Carbon Steel | 12555K55 | 0000 |
| 1 1/4 | 2" | 2 1/2" | 3/4" | Carbon Steel | 12555K56 | 0000 |
| 1 1/2 | 2 3/8" | 3" | 3/4" | Carbon Steel | 12555K57 | 00000 |
| 2 | 2 7/8" | 3 1/2" | 13/16" | Carbon Steel | 12555K58 | 00000 |
| 2 1/2 | 3 1/2" | 4 1/4" | 1" | Carbon Steel | 12555K59 | 00000 |
| 3 | 4 1/8" | 4 3/4" | 1" | Carbon Steel | 12555K61 | 00000 |
| 4 | 5 1/8" | 5 3/4" | 1 3/16" | Carbon Steel | 12555K62 | 00000 |