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.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met:
NPT: ANSI/MSS SP-114, ASTM A351
BSPT: ANSI/MSS SP-114 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Each | |
304 Stainless Steel | |||||
|---|---|---|---|---|---|
NPT Male | |||||
| 1/8 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 1/4 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/8 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 1/4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 2 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 3 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
BSPT Male | |||||
| 1/8 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1/4 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/8 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 1 1/4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
316 Stainless Steel | |||||
NPT Male | |||||
| 1/8 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1/4 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/8 | Solid | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 1/4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 2 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 3 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 4 | Hollow | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
BSPT Male | |||||
| 1/8 | Solid | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 |
| 1/4 | Solid | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 |
| 3/8 | Solid | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 |
| 1/2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 0000 |
| 3/4 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 |
| 1 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 |
| 1 1/4 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 |
| 1 1/2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 |
| 2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | 00000000 | 00000 |
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.
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 | Pressure Class | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPTF Male | ||||||
| 1/4 | 150 | 270 psi @ 72° F | 150 psi @ 350° F | ASME B16.14, ASTM A479, SAE J405 | 0000000 | 00000 |
| 3/8 | 150 | 270 psi @ 72° F | 150 psi @ 350° F | ASME B16.14, ASTM A479, SAE J405 | 0000000 | 0000 |
| 1/2 | 1000 | 1,000 psi @ 72° F | 650 psi @ 350° F | ANSI/MSS SP-114, ASME B16.14, ASTM A479, SAE J405 | 0000000 | 00000 |
| 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 |
Low-Pressure Stainless Steel Threaded Pipe Fittings with Sealant
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met: ANSI/MSS SP-114, ASTM A351
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
304 Stainless Steel | 316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Each | Each | ||
NPT Male | |||||||
| 1/8 | Solid | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 | 0000000 | 00000 |
| 1/4 | Solid | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 0000 | 0000000 | 0000 |
| 3/8 | Solid | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 0000 | 0000000 | 0000 |
| 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 0000 | 0000000 | 00000 |
| 3/4 | Hollow | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 | 0000000 | 00000 |
| 1 | Hollow | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 | 0000000 | 00000 |
| 1 1/4 | Hollow | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 | 0000000 | 00000 |
| 1 1/2 | Hollow | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 | 0000000 | 00000 |
| 2 | Hollow | 300 psi @ 72° F | 150 psi @ 360° F | 0000000 | 00000 | 0000000 | 00000 |
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.
- 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 | Plug Construction | Max. Pressure | Max. Steam Pressure | Each | |
304 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
NPT Male | ||||||
| 1/8 | 02 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 00000 |
| 1/4 | 04 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 0000 |
| 3/8 | 06 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 0000 |
| 1/2 | 08 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 0000 |
| 3/4 | 12 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 00000 |
| 1 | 16 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 00000 |
| 1 1/4 | 20 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | 24 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 00000 |
| 2 | 32 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 00000 |
| 3 | 48 | Solid | 2,500 psi @ 72° F | 1,900 psi @ 350° F | 00000000 | 000000 |
316 Stainless Steel | ||||||
NPT Male | ||||||
| 1/8 | 02 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 0000 |
| 1/4 | 04 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 0000 |
| 3/8 | 06 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1/2 | 08 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 3/4 | 12 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1 | 16 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1 1/4 | 20 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 1 1/2 | 24 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 2 | 32 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 00000 |
| 2 1/2 | 40 | Solid | 3,000 psi @ 72° F | 2,800 psi @ 350° F | 00000000 | 000000 |
Sealing Screws for Softwood and Plastic-Wood Composites
The neoprene-backed washer seals out contaminants. Also known as trim-head deck screws, they have a small flat head and slender shank to reduce the risk of splitting. They have a Type 17 auger point to penetrate softwood and plastic-wood composite decking material. Made from 18-8 stainless steel, they have good chemical resistance and are a good choice for ACQ-treated (arsenic-free) lumber. Screws may be mildly magnetic. Length is measured from the top of the head.
Head | Washer | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Dia. | Ht. | OD | Thick. | Drive Size | Drill Bit Size | Approximate Threads per Inch | Threading | Min. Thread Lg. | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||||
No. 7 | ||||||||||||
| 1" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 7/8" | 25 | 000000000 | 000000 |
| 1 5/8" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/8" | 25 | 000000000 | 00000 |
| 2 1/4" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 1 1/4" | 10 | 000000000 | 00000 |
| 3" | 0.23" | 0.125" | 0.63" | 0.2" | No. 1 | 1/16" | 16 | Partially Threaded | 2" | 10 | 000000000 | 00000 |