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
Push-to-Connect Tube Fittings for Air
- Temperature Range: 0° to 170° F, except polybutylene plastic fittings are 32° to 140° F
- Tubing: Use with firm (Durometer 95A-45D) polyethylene plastic or polyurethane rubber
- Specifications Met: ISO 14743, except cartridges and polybutylene plastic fittings
Insert tubing into these fittings and an internal gripping ring and O-ring hold the tubing tight. They are also known as instant fittings. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings have good corrosion resistance. Use them in low-pressure applications.
Identification rings (sold separately) snap over the release ring so you can color-code your lines.
Clips (sold separately) align and organize your tubing and fittings.
For technical drawings and 3-D models, click on a part number.
Caps fit over a tube stem end of a fitting or a piece of tubing.
| For Tube OD | Material | Color | Release Ring Color | Max. Pressure | Each | |
| 1/8" | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
| 5/32" | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 1/4" | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 5/16" | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 3/8" | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 4mm | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 6mm | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 8mm | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 10mm | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
| 12mm | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
| 14mm | Nylon Plastic | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
Plugs insert into the push-to-connect end of a fitting.
| Tube Stem OD | Material | Color | Max. Pressure | Each | |
Nylon Plastic | |||||
|---|---|---|---|---|---|
| 1/8" | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 00000 |
| 5/32" | Nylon Plastic | Red | 290 psi @ 72° F | 00000000 | 000 |
| 3/16" | Nylon Plastic | Red | 290 psi @ 72° F | 00000000 | 0000 |
| 1/4" | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 5/16" | Nylon Plastic | Red | 290 psi @ 72° F | 00000000 | 0000 |
| 3/8" | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 3mm | Nylon Plastic | Red | 290 psi @ 72° F | 00000000 | 0000 |
| 4mm | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 000 |
| 6mm | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 8mm | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 10mm | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 12mm | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
| 14mm | Nylon Plastic | Red | 290 psi @ 72° F | 0000000 | 0000 |
Low-Temperature D.O.T. Push-to-Connect Tube Fittings for Air
- Temperature Range: -40° to 210° F
- Tubing: Use with hard (Durometer 65D) nylon plastic
- Specifications Met: D.O.T. FMVSS 571, SAE J1131, SAE J2494-1, SAE J2494-3
except Identification Rings: D.O.T. FMVSS 571
Connect air brake lines with fittings that won’t crack in sub-zero temperatures. They meet Department of Transportation FMVSS 571 safety standards, so they’re often used in commercial trucks and trailers. Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. Fittings have a built-in tube support that slips inside the tubing to prevent it from collapsing. To disconnect, push on the release ring and pull the tubing out of the fitting. They have good corrosion resistance. Use them at up to 150 psi and attach them to hard tubing.
For technical drawings and 3-D models, click on a part number.
Tight-Seal Plastic Barbed Tube Fittings for Air and Water
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are nylon for excellent impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -50° to 275° F
- Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic
- Clarity: Black: Opaque; Off-White: Semi-Clear
| For Tube ID | Material | Max. Pressure | Pkg. Qty. | Choose a Color | Pkg. | |
| 1/16" | Nylon Plastic | Not Rated | 10 | 0000000 | 00000 | |
| 3/32" | Nylon Plastic | Not Rated | 10 | 0000000 | 0000 | |
| 1/8" | Nylon Plastic | Not Rated | 10 | 0000000 | 0000 | |
| 5/32" | Nylon Plastic | Not Rated | 10 | 0000000 | 0000 | |
| 3/16" | Nylon Plastic | Not Rated | 10 | 0000000 | 00000 | |
| 1/4" | Nylon Plastic | Not Rated | 10 | 0000000 | 00000 | |
| 3/8" | Nylon Plastic | Not Rated | 10 | 0000000 | 00000 | |
| 1/2" | Nylon Plastic | Not Rated | 10 | 0000000 | 00000 | |
| 5/8" | Nylon Plastic | Not Rated | 10 | 0000000 | 00000 |
Plastic Quick-Turn Tube Couplings for Air and Water
- For Use With: Polycarbonate Plastic: Air
Nylon Plastic: Air, Water
Polypropylene Plastic: Water - Temperature Range: Nylon Plastic, Polycarbonate Plastic: -20° to 200° F
Polypropylene Plastic: 35° to 150° F - Tubing: Use with soft (Durometer 40A-65A) PVC plastic or silicone rubber
Made of plastic, these couplings are lighter in weight than metal quick-turn couplings. Also known as luer lock couplings, they consist of a plug and socket (sold separately) that connect with a half turn. They have a compact body for easy installation in tight spaces. Plugs and sockets are open-flow style, so there is no shut-off valve to stop the flow when the coupling is separated. They have a universal connection, so the plugs will connect to any of the sockets, regardless of the pipe or tube size.
Nylon plugs and sockets have good impact and abrasion resistance. Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
Push-to-Connect Tube Fittings for Hot Drinking Water
- Temperature Range: 35° to 200° F
- Tubing: Use with hard polyethylene plastic
- Specifications Met: NSF/ANSI 51, NSF/ANSI 61
Run hot water through these fittings at temperatures up to 200° F. Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings are nylon for excellent impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.
Plugs insert into the push-to-connect end of a fitting.
| Tube Stem OD | Material | Color | Max. Pressure | Each | |
| 5/32" | Nylon Plastic | White | 230 psi @ 72° F | 00000000 | 00000 |
| 1/4" | Nylon Plastic | White | 230 psi @ 72° F | 00000000 | 0000 |
| 5/16" | Nylon Plastic | White | 230 psi @ 72° F | 00000000 | 0000 |
| 3/8" | Nylon Plastic | White | 190 psi @ 72° F | 00000000 | 0000 |
| 1/2" | Nylon Plastic | White | 160 psi @ 72° F | 00000000 | 0000 |
| 4mm | Nylon Plastic | White | 230 psi @ 72° F | 00000000 | 0000 |
| 6mm | Nylon Plastic | White | 230 psi @ 72° F | 00000000 | 0000 |
| 8mm | Nylon Plastic | White | 230 psi @ 72° F | 00000000 | 0000 |
| 10mm | Nylon Plastic | White | 190 psi @ 72° F | 00000000 | 0000 |
| 12mm | Nylon Plastic | White | 190 psi @ 72° F | 00000000 | 0000 |
Caps fit over a tube stem end of a fitting or a piece of tubing.
| For Tube OD | Material | Color | Release Ring Color | Max. Pressure | Each | |
| 5/32" | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 00000 |
| 1/4" | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 0000 |
| 5/16" | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 0000 |
| 3/8" | Nylon Plastic | White | Gray | 190 psi @ 72° F | 00000000 | 0000 |
| 4mm | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 0000 |
| 6mm | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 0000 |
| 8mm | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 0000 |
| 10mm | Nylon Plastic | White | Gray | 190 psi @ 72° F | 00000000 | 0000 |
| 12mm | Nylon Plastic | White | Gray | 160 psi @ 72° F | 00000000 | 0000 |