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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 Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
Caps

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Female | |||||
---|---|---|---|---|---|
1/4 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 00000 |
3/8 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 0000 |
1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 0000 |
3/4 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 0000 |
1 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 0000 |
1 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 0000 |
1 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 00000 |
2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 00000000 | 00000 |
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 0000000 | 00000 |
Plugs with External Square Drive

- For Use With:
NPT and BSPT: Air, Natural Gas, Oil, Steam, Water
NPTF: Air, Natural Gas, Steam, Water - Pressure Class:
NPT Iron: 125
BSPT Iron: 150 - Specifications Met:
See table - Pipe Nipples and Pipe:
NPT and BPST: Use Schedule 40 steel
Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Material | Specifications Met | Each | |
BSPT Male | |||||||
---|---|---|---|---|---|---|---|
1/4 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 00000 |
3/8 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 0000 |
1/2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 0000 |
3/4 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 0000 |
1 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 0000 |
1 1/4 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 0000 |
1 1/2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 0000 |
2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 00000000 | 00000 |
2 1/2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 0000000 | 00000 |
Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.
For technical drawings and 3-D models, click on a part number.
Caps

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, ASTM A153, UL Listed
BSPT: ASTM A197, DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 galvanized steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Female | |||||
---|---|---|---|---|---|
1/4 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 00000 |
3/8 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
3/4 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
1 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
1 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
2 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 00000 |
Plugs with External Square Drive

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: See table
- Specifications Met:
NPT Steel: SAE J531
NPT Iron: ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed
BSPT: ASTM A197, DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 galvanized steel
Pipe Size | Plug Construction | Pressure Class | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Male | |||||||
---|---|---|---|---|---|---|---|
1/4 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 00000 |
3/8 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
1/2 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
3/4 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
1 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
1 1/2 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 0000 |
2 | Hollow | 150 | 150 psi @ 72° F | 150 psi @ 360° F | Galvanized Iron | 00000000 | 00000 |