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.
More
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.
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
304 Stainless Steel | ||||
|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
BSPT Female × Butt Weld | ||||
| 1/8 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 1/4 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/8 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 3/4 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 0000 |
| 1 1/2 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
| 2 | 300 psi @ 72° F | 150 psi @ 350° F | 00000000 | 00000 |
Nuts for High-Pressure Nipples for Compressed Gas
Slide a high-pressure hose nipple for compressed gas into one of these nuts to connect a pipe to the inlet of a pressure regulator. They are also known as CGA (Compressed Gas Association) nuts and inlet nuts.
Brass nuts have good corrosion resistance and are softer than 316 stainless steel nuts, so they're easier to thread together. Aluminum-plated brass nuts have better corrosion and wear resistance than unplated brass.
Note: Nuts have a CGA, BS, or DIN number that corresponds to a specific type of gas. Choose a nut with the same number as your tank and other system components.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 9: 250° F
| Number | Pipe Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Brass | |||||||
|---|---|---|---|---|---|---|---|
| DIN 477 No. 9 | 3/4 | BSPT | Right Hand | 4,300 psi @ 72° F | Oxygen | 000000000 | 000000 |
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 12: 250° F
Threaded Round Plugs for BSPT Pipe
Safeguard internally threaded BSPT connections from contaminants during fabrication and storage.
Install external 12-point drive plugs manually or with a 12-point wrench or socket.
Install external hex-drive plugs manually or with a hex-drive wrench or socket.
Polypropylene plugs offer more wear resistance than nylon plugs.
For technical drawings and 3-D models, click on a part number.
| Pipe Size | Ht. | Max. Temp., °F | Hardness | Color | Pkg. Qty. | Pkg. | |
External 12-Point Drive | |||||||
|---|---|---|---|---|---|---|---|
Polypropylene Plastic | |||||||
| 1/4 | 3/8" | 250° | Rockwell R90 | Yellow | 10 | 0000000 | 00000 |
| 3/8 | 3/8" | 250° | Rockwell R90 | Yellow | 10 | 0000000 | 0000 |
| 1/2 | 7/16" | 250° | Rockwell R90 | Yellow | 10 | 0000000 | 0000 |
| 3/4 | 7/16" | 250° | Rockwell R90 | Yellow | 10 | 0000000 | 0000 |
External Hex Drive | |||||||
Nylon Plastic | |||||||
| 1/4 | 11/32" | 245° | Durometer 54D | Yellow | 10 | 0000000 | 00000 |
| 3/8 | 11/32" | 245° | Durometer 54D | Yellow | 10 | 0000000 | 00000 |
| 1/2 | 15/32" | 245° | Durometer 54D | Yellow | 10 | 0000000 | 00000 |
| 3/4 | 15/32" | 245° | Durometer 54D | Yellow | 10 | 0000000 | 00000 |
| 1 | 19/32" | 245° | Durometer 54D | Yellow | 5 | 0000000 | 0000 |