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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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. Polycarbonate plugs and sockets are clear so you can monitor your line. Polypropylene plugs and sockets are moisture resistant and won’t absorb water and lose strength, even in high-humidity environments.
Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
Barbed plugs and sockets insert into tubing and secure with a clamp.
| For Tube ID | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 1/16" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/16" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/32" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/32" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/32" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/8" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/8" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/8" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 5/32" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 5/32" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 5/32" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/16" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/16" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/16" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| Thread Size | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
UN/UNF (SAE Straight) Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/4"-28 | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 1/4"-28 | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
UN/UNF Taper Threads | |||||||
| 10-32 | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
Barbed plugs and sockets insert into tubing and secure with a clamp.
| For Tube ID | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 1/16" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/16" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/32" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/32" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/32" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/8" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/8" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/8" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 5/32" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 5/32" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 5/32" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/16" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/16" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 3/16" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4" | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4" | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4" | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| Thread Size | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
UN/UNF (SAE Straight) Threads | |||||||
|---|---|---|---|---|---|---|---|
| 10-32 | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 10-32 | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 10-32 | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 1/4"-28 | Nylon Plastic | White | Opaque | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| 1/4"-28 | Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| 1/4"-28 | Polypropylene Plastic | White | Semi-Clear | 40 psi @ 72° F | 10 | 000000000 | 0000 |
| Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
| Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
| Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
| Polycarbonate Plastic | Clear | Clear | 40 psi @ 72° F | 10 | 000000000 | 00000 |
