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 Stainless Steel Threaded Pipe Fittings
Use these heavy duty fittings in high-pressure flow applications.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance. Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASTM A182
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
304 Stainless Steel | |||||
|---|---|---|---|---|---|
NPT Female | |||||
| 1/8 | 02 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 1/4 | 04 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 3/8 | 06 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 1/2 | 08 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 3/4 | 12 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 1 | 16 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 1 1/4 | 20 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 1 1/2 | 24 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
| 2 | 32 | 2,900 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
316 Stainless Steel | |||||
NPT Female | |||||
| 1/8 | 02 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 00000 |
| 1/4 | 04 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 3/8 | 06 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 1/2 | 08 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 3/4 | 12 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 1 | 16 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 1 1/4 | 20 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 1 1/2 | 24 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
| 2 | 32 | 2,900 psi @ 72° F | 2,000 psi @ 350° F | 00000000 | 000000 |
High-Pressure Socket-Connect Stainless Steel Unthreaded Pipe Fittings
Forged for excellent strength, these heavy duty socket-connect fittings stand up to high-pressure applications. 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.
Union straight connectors separate into three pieces for access to your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASTM A182
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
304/304L Stainless Steel | 316/316L Stainless Steel | ||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Max. Steam Pressure | Max. Pressure | Each | Each | ||
| 1/4 | 04 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 000000 | 000000000 | 0000000 |
| 3/8 | 06 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 00000 | 000000000 | 000000 |
| 1/2 | 08 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 00000 | 000000000 | 000000 |
| 3/4 | 12 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
| 1 | 16 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
| 1 1/2 | 24 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
| 2 | 32 | 1,900 psi @ 350° F | 2,900 psi @ 72° F | 000000000 | 000000 | 000000000 | 000000 |
High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
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.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: MSS SP-83, ASME B1.20.1, ASTM A105
- 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 | 00000 |
| 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 |
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: MSS SP-83, ASME B1.20.1, ASTM A105
- 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 | ||||||
|---|---|---|---|---|---|---|
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 000000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 00000000 | 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 Pressure Class 3000 fittings, they have excellent strength to handle high-pressure applications.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASME B1.20.1, ASTM A105, ASTM B633, MSS SP-83
- Pipe Nipples and Pipe: Use Schedule 160 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 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 | 00000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
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.
Union straight connectors separate into three pieces for access to your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class : 3000
- Specifications Met: ASTM A105, MSS SP-83
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 and 600 steel
| Pipe Size | Max. Pressure | Material | Each | |
| 1/8 | 3,000 psi @ 72° F | Steel | 000000000 | 000000 |
| 1/4 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 3/8 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 1/2 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 3/4 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 1 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 1 1/4 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 1 1/2 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 2 | 3,000 psi @ 72° F | Steel | 000000000 | 00000 |
| 2 1/2 | 3,000 psi @ 72° F | Steel | 000000000 | 000000 |
| 3 | 3,000 psi @ 72° F | Steel | 000000000 | 000000 |
High-Pressure Aluminum Threaded Pipe Fittings
Also known as Pressure Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer. They are lightweight with good corrosion resistance.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water
- Pressure Class : 3000
- Specifications Met: Fed. Spec. QQ-A-200/8, ASTM B221, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 80 aluminum
| Pipe Size | Max. Pressure | Each | |
NPT Female | |||
|---|---|---|---|
| 1 | 1,500 psi @ 72° F | 00000000 | 0000000 |