Material Material |
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Connection Style Connection Style |
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| Threaded |
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| Butt Weld |
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| Socket Connect |
For Pipe Material For Pipe Material | Show |
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For Pipe Material For Pipe Material | Hide |
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Shape Shape |
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 | Straight |
Type Type |
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 | Adapter |
Gender Gender |
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For Use With For Use With |
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System of Measurement System of Measurement |
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Length Length |
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Maximum Pressure Maximum Pressure |
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Connection Type Connection Type |
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 | Pipe |
Specifications Met Specifications Met |
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Maximum Steam Pressure Maximum Steam Pressure |
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Wall Thickness Wall Thickness |
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Fabrication Fabrication |
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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 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
- 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
304 Stainless Steel | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female × Butt Weld | ||||||
| 1/8 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 1 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 0000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 3 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 00000 |
| 4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 00000000 | 000000 |
BSPT Female × Butt Weld | ||||||
| 1/8 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 000000 | 00 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 000000 | 00 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 000000 | 00 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 000000 | 00 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 000000 | 00 |
| 1 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 | 000000 | 00 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 000000 | 00 |
| 2 | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 | 000000 | 00 |
Premium Low-Pressure Stainless Steel
Threaded Pipe Fittings with Certification
Unlike other stainless steel fittings, these are made in the U.S.A. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition. All meet ANSI/MSS SP-114, which means they adhere to standards for heat treating, material thickness, and marking. It’s the highest quality standard for Class 150 low-pressure stainless steel fittings. They also meet ASTM A351 requirements for parts that have been cast and will be used in pressure systems.
These stainless steel fittings are more corrosion resistant than steel fittings, and almost as strong. 304 stainless steel fittings will hold up in humid, damp, and washdown environments, but will corrode if exposed to salt water or chemicals. 316 stainless steel fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Class: 150
- Fabrication: Heat Treated
- Specifications Met: ANSI/MSS SP-114, ASTM A351
- Certification: Material Certificate with Traceable Lot Number
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
NPT Female × Butt Weld | ||||
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 000000 |
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 00000 |
| 3 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 00000 |
| 4 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 000000 |
316 Stainless Steel | ||||
NPT Female × Butt Weld | ||||
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 00000 |
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 00000 |
| 3 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 00000 |
| 4 | 300 psi @ 72° F | 150 psi @ 350° F | 000000000 | 000000 |
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
- 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
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
304 Stainless Steel | ||||
|---|---|---|---|---|
NPT Female × Butt Weld | ||||
| 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 |
| 1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 |
| 2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 |
| 2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
| 4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
316 Stainless Steel | ||||
NPT Female × Butt Weld | ||||
| 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 0000 |
| 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 |
| 2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
| 3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
| 4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 |
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
- Class: 3000
- Specifications Met: ANSI/ASME B16.11, 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 × Butt Weld | |||||
| 1/8 | 02 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 1/4 | 04 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 0000 |
| 3/8 | 06 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 0000 |
| 1/2 | 08 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 0000 |
| 3/4 | 12 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 0000 |
| 1 | 16 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 1 1/4 | 20 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 1 1/2 | 24 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 2 | 32 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 2 1/2 | 40 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 00000 |
| 3 | 48 | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 000000000 | 000000 |
316 Stainless Steel | |||||
NPT Female × Butt Weld | |||||
| 1/8 | 02 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 0000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 0000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 0000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 0000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 2 | 32 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 2 1/2 | 40 | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 000000 |
| 3 | 48 | 3,000 psi @ 72° F | 2,800 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.
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, Water, Hydraulic Fluid, Natural Gas, Steam, Oil
- Class: 3000
- Specifications Met: ASTM A182, ANSI/ASME B16.11
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
| Pipe Size | Dash Size | Max. Steam Pressure | Max. Pressure | Each | |
304/304L Stainless Steel | |||||
|---|---|---|---|---|---|
Socket Connect × Butt Weld | |||||
| 1/8 | 02 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 00000 |
| 1/4 | 04 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 0000 |
| 3/8 | 06 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 0000 |
| 1/2 | 08 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 00000 |
| 3/4 | 12 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 00000 |
| 1 | 16 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 24 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 00000 |
| 2 | 32 | 1,900 psi @ 350° F | 2,500 psi @ 72° F | 000000000 | 00000 |
316/316L Stainless Steel | |||||
Socket Connect × Butt Weld | |||||
| 1/8 | 02 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 1/4 | 04 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 3/8 | 06 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 1/2 | 08 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 3/4 | 12 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 1 | 16 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 1 1/2 | 24 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 00000 |
| 2 | 32 | 1,900 psi @ 350° F | 3,000 psi @ 72° F | 000000000 | 000000 |