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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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 fittings except 1/4" and 3/8" plugs and plugs with hex drive adhere to ANSI/MSS SP-114 standards for heat treating, material thickness, and marking. It’s the highest quality standard for Pressure Class 150 low-pressure stainless steel fittings. They also meet either ASTM A351 or A479 requirements for parts that will be used in pressure systems.
These stainless steel fittings are more corrosion resistant than steel fittings, and almost as strong. 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 ORDER HISTORY after your order ships.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Fabrication: Heat Treated
- Specifications Met: See table
- Certification: Material Certificate with Traceable Lot Number
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
| Pipe Size  | Drive Size | Pressure Class | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPTF Male | |||||||
| 1/2 | 7/8" | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASTM A276, ASTM A479 | 0000000 | 000000 |
| 3/4 | 1 1/16" | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 1 | 1 5/16" | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 1 1/4 | 1 3/4" | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 1 1/2 | 2" | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 2 | 2 1/2" | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASTM A276, ASTM A479 | 0000000 | 00000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: See table
- Fabrication: Heat Treated
- Specifications Met: See table
- Certification: Material Certificate with Traceable Lot Number
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| Pipe Size | Pressure Class | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPTF Male | ||||||
| 1/2 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A479, SAE J405 | 0000000 | 000000 |
| 3/4 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A479, SAE J405 | 0000000 | 00000 |
| 1 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 1 1/4 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 1 1/2 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479 | 0000000 | 00000 |
| 2 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479 | 0000000 | 00000 |
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.
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
304 Stainless Steel | 316 Stainless Steel | |||||
|---|---|---|---|---|---|---|
| Pipe Size | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Female | ||||||
| 1/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
| 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 0000 |
| 3/8 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 0000 |
| 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 0000 | 00000000 | 0000 |
| 3/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
| 1 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
| 1 1/4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
| 1 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
| 2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 0000000 | 00000 | 00000000 | 00000 |
| 2 1/2 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 00000 | 00000000 | 000000 |
| 3 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 00000000 | 000000 |
| 4 | 1,000 psi @ 72° F | 650 psi @ 350° F | 00000000 | 000000 | 000000 | 00 |