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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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High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.
Note: The maximum pressure listed for Class 3000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.
For technical drawings and 3-D models, click on a part number.
Caps
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure 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 | 00000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 0000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 0000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 0000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 0000 |
| 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 | 00000 |
| 2 1/2 | 40 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 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 |
Plugs with External Hex Drive
Plug
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASTM A105, ASME B16.11, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 160 steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Male | |||||||
|---|---|---|---|---|---|---|---|
| 1/8 | 02 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1/4 | 04 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 3/8 | 06 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1/2 | 08 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 3/4 | 12 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1 | 16 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1 1/4 | 20 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1 1/2 | 24 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 | 32 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 1/2 | 40 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 3 | 48 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 4 | 64 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
Plugs with External Square Drive
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASTM A105, ASME B16.11, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 160 steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Male | |||||||
|---|---|---|---|---|---|---|---|
| 1/8 | 02 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1/4 | 04 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 3/8 | 06 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1/2 | 08 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 3/4 | 12 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1 | 16 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1 1/4 | 20 | Hollow | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 0000 |
| 1 1/2 | 24 | Hollow | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 | 32 | Hollow | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 2 1/2 | 40 | Hollow | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 3 | 48 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 4 | 64 | Solid | 6,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
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 Pressure Class 3000 fittings, they have excellent strength to handle high-pressure applications.
For technical drawings and 3-D models, click on a part number.
Caps
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105, ASTM B633
- 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 | 00000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 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 | 00000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
Plugs with External Hex Drive
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105, ASTM B633
- Pipe Nipples and Pipe: Use Schedule 160 steel
| Pressure Class | Pipe Size | Dash Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | |||||||
|---|---|---|---|---|---|---|---|
| 3000 | 1/8 | 02 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3000 | 1/4 | 04 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3000 | 3/8 | 06 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3000 | 1/2 | 08 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3000 | 3/4 | 12 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3000 | 1 | 16 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 0000 |
| 3000 | 1 1/4 | 20 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3000 | 1 1/2 | 24 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3000 | 2 | 32 | Solid | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
Extreme-Pressure Socket-Connect Stainless Steel Unthreaded Pipe Fittings
The strongest socket-connect fittings we offer, these heavy duty forged fittings are also known as Pressure Class 6000. They 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.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Caps
- For Use With: Air, Natural Gas, Oil, Water, Steam
- Pressure Class : 6000
- Specifications Met: ASME B16.11, ASTM A182, ASME B1.20.1
- Pipe: Use Schedule 160 stainless steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
304/304L Stainless Steel | ||||
|---|---|---|---|---|
| 1/2 | 7,700 psi @ 72° F | 6,500 psi @ 220° F | 0000000 | 000000 |
| 3/4 | 7,100 psi @ 72° F | 5,900 psi @ 220° F | 0000000 | 00000 |
| 1 | 6,400 psi @ 72° F | 5,300 psi @ 220° F | 0000000 | 00000 |
| 2 | 4,700 psi @ 72° F | 3,900 psi @ 220° F | 0000000 | 000000 |
316/316L Stainless Steel | ||||
| 3/4 | 7,100 psi @ 72° F | 5,900 psi @ 220° F | 0000000 | 00000 |
| 1 | 6,400 psi @ 72° F | 5,300 psi @ 220° F | 0000000 | 00000 |