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 Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line.
Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Threaded female x butt weld straight adapters are also known as half couplings. Adapters with weld end allow for a permanent connection.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met:
NPT × Butt Weld: ANSI/MSS SP-114, ASTM A351
BSPT × Butt Weld: ANSI/MSS SP-114 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
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. Threaded female x butt weld straight adapters are also known as half couplings.
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, ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
Medium-Pressure Stainless Steel Threaded Pipe Fittings
Choose these fittings when you want the same high-quality found in our low-pressure pipe fittings, but need more strength to handle higher pressures.
Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Threaded female x butt weld straight adapters are also known as half couplings.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class : 1000
- Specifications Met: ANSI/MSS SP-114, ASTM A182
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
High-Pressure Iron and Steel Threaded Pipe Fittings
These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.
Threaded female x butt weld straight adapters are also known as half couplings.
Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.
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 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 × Butt Weld | ||||||
|---|---|---|---|---|---|---|
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | Zinc-Phosphate-Coated Steel | 0000000 | 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.
Threaded female x butt weld straight adapters are also known as half couplings.
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, 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 × Butt Weld | |||||
|---|---|---|---|---|---|
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
Extreme-Pressure Steel Threaded Pipe Fittings
The strongest steel fittings we offer, these can withstand extreme-pressure applications.
Threaded female x butt weld straight adapters are also known as half couplings.
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 : 6000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use Class 1500 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female × Butt Weld | ||||||
|---|---|---|---|---|---|---|
| 1/2 | 08 | 6,000 psi @ 72° F | 300 psi @ 360° F | Steel | 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.
Socket connect x butt weld straight adapters are also known as half couplings.
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, ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 and 600 steel
| Pipe Size | Wall Thick. | Construction | Max. Pressure | Max. Steam Pressure | Material | Each | |
Socket Connect Female × Butt Weld | |||||||
|---|---|---|---|---|---|---|---|
| 1/2 | 0.33" | Seamless | 3,000 psi @ 72° F | Not Rated | Steel | 000000000 | 00000 |
Low-Pressure Aluminum Threaded Pipe Fittings
In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.
Threaded female x butt weld straight adapters are also known as half couplings.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Water
- Specifications Met: See table, ASTM 865
- Pressure Class: 150
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
- Flanges: Use Class 125 aluminum
| Pipe Size | Max. Pressure | Specifications Met | Each | |
NPT Female × Butt Weld | ||||
|---|---|---|---|---|
| 1/2 | 150 psi @ 72° F | ASME B1.20.1, ASTM A865, ASTM B221 | 000000000 | 00000 |
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.
Threaded female x butt weld straight adapters are also known as half couplings.
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 × Butt Weld | |||
|---|---|---|---|
| 1/2 | 3,000 psi @ 72° F | 0000000 | 000000 |
Titanium Threaded Pipe Fittings
Titanium has similar strength to steel, but is approximately 40% lighter. It has better corrosion resistance than most stainless steel alloys and can handle corrosive substances, such as salt water and acids.
Threaded female x butt weld straight adapters are also known as half couplings.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Salt Water, Water, Natural Gas
- Specifications Met: ASME B16.11, ASTM B348
| Pipe Size | Max. Pressure | Each | |
NPT Female × Butt Weld | |||
|---|---|---|---|
| 1/2 | 3,000 psi @ 72° F | 0000000 | 000000 |