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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Precision Extreme-Pressure Brass Threaded Pipe Fittings
Also known as instrumentation fittings, these have the most precise threads and the tightest tolerances of all the brass pipe fittings we offer. Fittings are brass for good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
- For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
- For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
- Specifications Met:
NPT: ASME B1.20.1, ASME B31.1, ASME B31.3
BSPT: ASME B31.3, DIN 2999, ISO 7.1
Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | |||||
|---|---|---|---|---|---|
| 1/8 | Hollow | 5,600 psi @ 72° F | 1,500 psi @ 300° F | 0000000 | 00000 |
| 1/4 | Hollow | 4,100 psi @ 72° F | 1,500 psi @ 300° F | 0000000 | 0000 |
| 3/8 | Hollow | 4,000 psi @ 72° F | 1,500 psi @ 300° F | 0000000 | 00000 |
| 1/2 | Hollow | 3,900 psi @ 72° F | 1,500 psi @ 300° F | 0000000 | 00000 |
| 3/4 | Hollow | 3,800 psi @ 72° F | 1,500 psi @ 300° F | 0000000 | 00000 |
BSPT Male | |||||
| 1/4 | Hollow | 3,300 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 00000 |
| 1 | Hollow | 2,200 psi @ 72° F | 1,500 psi @ 300° F | 00000000 | 00000 |
Brass and Bronze Unthreaded Pipe Flanges
Bolt these flanges to equipment or to another same-size, flat-surface flange with a gasket (sold separately). They have good corrosion resistance.
Cap flanges are also known as blind flanges.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Water
- Pressure Class : 150
- Specifications Met: ASME B16.24
- Pipe Nipples and Pipe: Use Schedule 40 brass
Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing
- For Use With: Argon, Helium, Nitrogen
- Temperature Range: -420° to 1000° F
- Tubing: Use with 316/316L stainless steel
- Compatible With: Swagelok® VCR
The 15 Ra finish on the interior of these fittings creates an ultra-smooth surface. Also known as ultra-high-purity fittings, they are packed in a Class 100 clean room to prevent contamination. They are commonly used in semiconductor applications. Fittings use a metal gasket (sold separately), which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and high-vacuum applications. Fittings are 316 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Use a female nut to connect a threaded adapter or a Yor-Lok adapter with a butt-weld adapter.
