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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.
- 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 |
- 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 |
Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 316 stainless steel fittings have excellent corrosion resistance. Adapters with weld end allow for a permanent connection.
Adapters for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum. Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
- For Use With: Water, Oil, Gasoline, Diesel Fuel
- Specifications Met: ASTM A182, ASME B1.20.1
316 Stainless Steel | |||||
|---|---|---|---|---|---|
| Pipe Size | For Hole Dia. | OD | Lg. | Each | |
NPT Female × Weld | |||||
| 1/4 | 15/16" | 1 1/2" | 5/16" | 1145K51 | 000000 |
| 3/8 | 15/16" | 1 1/2" | 5/16" | 1145K52 | 00000 |
| 1/2 | 1 1/8" | 1 3/4" | 3/8" | 1145K53 | 00000 |
| 3/4 | 1 3/8" | 2 1/8" | 7/16" | 1145K54 | 00000 |
| 1 | 1 11/16" | 2 3/8" | 1/2" | 1145K55 | 00000 |
| 1 1/4 | 2" | 2 11/16" | 1/2" | 1145K56 | 00000 |
| 1 1/2 | 2 1/4" | 3" | 1/2" | 1145K57 | 00000 |
| 2 | 2 5/8" | 3 1/2" | 9/16" | 1145K58 | 00000 |
| 2 1/2 | 3 3/16" | 4 1/16" | 13/16" | 1145K59 | 000000 |
| 3 | 3 11/16" | 4 5/8" | 13/16" | 1145K61 | 000000 |
| 4 | 4 7/8" | 5 3/4" | 1 3/16" | 1145K62 | 000000 |