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Maximum Pressure Maximum Pressure |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Socket Connect Type Socket Connect Type |
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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.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Class: 150
- Specifications Met: ASME B16.3, UL Listed, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
| Pipe Size  | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 00000000 | 000000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 00000000 | 00000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 1 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 000000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 00000000 | 000000 |
| 3 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 00000000 | 000000 |
| 4 | 150 psi @ 72° F | 150 psi @ 350° F | Black-Coated Iron | 00000000 | 000000 |
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.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Class: 150
- Specifications Met: ASTM A197, UL Listed, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 3 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Class: 3000
- Specifications Met: ASME B16.11, ASTM A105, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 160 steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | ||||||
|---|---|---|---|---|---|---|
| 1/8 | 02 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 00000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 000000 |
| 2 1/2 | 40 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 3 | 48 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 4 | 64 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
High-Pressure Galvanized Steel Threaded Pipe Fittings
A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Class 3000 fittings, they have excellent strength to handle high-pressure applications.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Class: 3000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
- Pipe Nipples and Pipe: Use Schedule 160 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/8 | 02 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Compact Precision Extreme-Pressure
Steel Threaded Pipe Fittings
Made to tighter tolerances than other steel pipe fittings, these are also known as instrumentation fittings. They are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Water, Hydraulic Fluid
- Specifications Met:
1/8-3/8, 1/2 Pipe Sizes: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179
3/4 Pipe Size: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A108
Medium-Pressure Iron and Steel Threaded Pipe Fittings
With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Class: 300
- Specifications Met: ASTM A197, UL Listed, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 or 600 steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/4 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 000000 |
| 1/2 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 00000 |
| 3/4 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 00000 |
| 1 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 00000 |
| 1 1/4 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 00000 |
| 1 1/2 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 000000 |
| 2 | 300 psi @ 72° F | 300 psi @ 550° F | Iron | 00000000 | 000000 |
High-Pressure Socket-Connect
Steel Unthreaded Pipe Fittings
Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings have heavy duty construction that stands up to high-pressure applications. They are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Class: 3000
- Specifications Met: ASTM A105, ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 and 600 steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
| 1/8 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 000000 |
| 1/4 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 3/8 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 1/2 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 3/4 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 1 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 1 1/4 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 1 1/2 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 2 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
| 2 1/2 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 000000 |
| 3 | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 000000 |