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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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. 316 stainless steel nuts have excellent corrosion resistance.
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 | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
| CGA 705 | 1.125"-14 | UNS | Right Hand | 3,000 psi @ 72° F | Ammonia | 000000000 | 000000 |
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 12: 250° F
| Number | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Brass | |||||||
|---|---|---|---|---|---|---|---|
| CGA 296 | 0.803"-14 | UNS | Right Hand | 3,000 psi @ 72° F | Oxygen Mixtures | 000000000 | 00000 |
High-Pressure Threaded Fittings for Compressed Gas
Designed to handle high-pressure welding applications, these fittings are commonly used to connect pressure regulators to compressed gas tanks or cylinders. Fittings are also known as CGA (Compressed Gas Association) fittings. They are brass for good corrosion resistance.
Fittings with left-hand threads are identified with a notch in the nut.
Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 3,000 psi @ 72° F
- Maximum Temperature: 120° F
CGA Number | Tank Connection | Regulator Connection | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Tank | Regulator | Thread Size | Thread Type | Thread Direction | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | ||||||||||
| 296 | 590 | 0.803"-14 | UNS | Right Hand | 0.960"-14 | NGO | Left Hand | Oxygen Mixtures, Sulfur Hexafluoride | 0000000 | 000000 |
Push-to-Connect Fittings for Food and Beverage
- Temperature Range: 35° to 140° F
- Tubing: See table
- Specifications Met: See table
Also known as instant fittings, these connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect fittings with a release ring, push on the release ring and pull the tubing out of the fitting.
Polypropylene fittings have excellent impact and abrasion resistance. They meet NSF/ANSI standards for safe use with food. Some are also FDA compliant for indirect contact with food.
Black fittings have excellent UV resistance and are suitable for outdoor environments.
Fittings with UNS threads are also known as faucet connectors; they attach directly to a faucet threaded inlet or water line.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Thread Size | Material | Release Ring Color | Max. Pressure | For Tube Hardness Rating | For Tube Hardness | Specifications Met | Each | |
UNS Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
White | |||||||||
| 1/4" | 7/16"-24 | Polypropylene Plastic | White | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 51, NSF/ANSI 61 | 0000000 | 00000 |
| 3/8" | 7/16"-24 | Polypropylene Plastic | White | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 51, NSF/ANSI 61 | 0000000 | 0000 |
Black | |||||||||
| 1/4" | 7/16"-24 | Polypropylene Plastic | Black | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
| 5/16" | 7/16"-24 | Polypropylene Plastic | Black | 150 psi @ 72° F | Hard | Durometer 50D-70D | NSF/ANSI 58, NSF/ANSI 372, FDA Compliant 21 CFR 176.170 | 00000000 | 0000 |
Plastic Push-to-Connect Tube Fittings for Chemicals
- For Use With: Inch: Alcohol, Hydrochloric Acid, Nitric Acid, Sodium Carbonate, Sulfuric Acid
Metric: Acetic Acid, Alcohol, Arsenic Acid, Benzoic Acid, Fluoboric Acid, Sodium Carbonate, Sulfuric Acid - Temperature Range: Inch: 0° to 270° F
Metric: 32° to 175° F - Tubing: Use with hard (Durometer 55D-60D) FEP plastic
Also known as instant fittings, these chemical-resistant plastic fittings connect to tubing with a push. An internal gripping ring holds the tubing tight. To disconnect, push on the release ring and pull the tubing out of the fitting. Use these fittings in low-pressure applications.
PVDF fittings offer excellent chemical resistance, and can be used with hydrochloric acid and nitric acid. They withstand temperatures up to 270° F, higher than other push-to-connect fittings for chemicals. They are produced in a clean room and are bagged individually to prevent dirt and moisture from contaminating the inside. PVDF is also known as Kynar.
Fittings with UNS threads are also known as faucet connectors; they attach directly to a faucet threaded inlet or water line.
For technical drawings and 3-D models, click on a part number.
Threaded connections can be taken apart as needed for maintenance and repair.
| For Tube OD | Thread Size | Material | Color | Release Ring Color | Max. Pressure | Each | |
UNS Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 7/16"-24 | PVDF Plastic | Black | Gray | 300 psi @ 72° F | 00000000 | 00000 |
Swivels for Container-Mount Grease Dispenser Nozzles
Move grease-dispensing guns in any direction without kinking the outlet hose.
For technical drawings and 3-D models, click on a part number.
| Type | Connection | Max. Grease Outlet Pressure, psi | Swivel Angle | Material | Each | |
90° Elbow | ||||||
|---|---|---|---|---|---|---|
| Reducing Adapter | 1/2"-27 UNS Male × 1/4 NPT Male | 5,000 | 360° | Steel | 0000000 | 0000000 |
Straight | ||||||
| Reducing Adapter | 1/2"-27 UNS Male × 1/4 NPT Male | 7,500 | 360° | Steel | 0000000 | 00000 |
Z-Swivel | ||||||
| Reducing Adapter | 1/2"-27 UNS Male × 1/4 NPT Male | 7,500 | 360° | Steel | 0000000 | 000000 |