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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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Easy-View Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -210° to 270° F
- Tubing: Use with firm or soft (Durometer 45A-90A) polyurethane rubber or PVC plastic
Monitor flow with these clear fittings. They have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Fittings are polycarbonate for excellent impact resistance.
Straight Adapters, Tube × Male Threaded Pipe
| For Tube ID | Pipe Size | Thread Size | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/16" | 1/16 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 1/16" | 1/8 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/32" | 1/16 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/32" | 1/8 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 1/16 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 1/8 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/16 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/8 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 1/16 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 1/8 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | 1/8 | __ | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
UN/UNF (SAE Straight) Threads | ||||||||
| 1/16" | __ | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/32" | __ | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | __ | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | __ | 10-32 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Straight Connectors, Tube
| For Tube ID | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 0000 |
| 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 0000 |
| 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 0000 |
| 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 0000 |
| 1/4" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 0000 |
Straight Reducers, Tube
| For Tube ID (A) | For Tube ID (B) | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 3/32" | 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 1/8" | 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
90° Elbow Connectors, Tube
| For Tube ID | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Tee Connectors, Tube
| For Tube ID | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Inline Tee Reducers, Tube
Inline tees are also known as branch tees.
| For Tube ID (A) | For Tube ID (B) | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 1/8" | 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 1/4" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/4" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Wye Connectors, Tube
| For Tube ID | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 3/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/4" | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Plastic Luer Lock Tube Couplings for Air and Water
- For Use With: Nylon Plastic: Air, Water
Polycarbonate Plastic: Air
Polypropylene Plastic: Water - Temperature Range: See table
- Tubing: Use with soft (Durometer 40A-65A) PVC plastic or silicone rubber
Made of plastic, these couplings are lighter in weight than metal luer lock couplings. They're a popular choice in labs because of their versatility—they fit any other luer lock plug, socket, syringe, or needle. Quick to attach and detach, they’re often used in lines that are frequently disconnected. They have a compact body for easy installation in tight spaces. Use them in low-pressure applications. These couplings are open-flow style, so there is no shut-off valve to stop the flow when they’re separated.
Plugs with a locking ring are more secure than those without a locking ring. Give the ring a half turn to lock these couplings in place. You can’t remove the locking ring.
Note: For a complete coupling, order a plug and a socket.
Straight Plugs, Barbed Tube
With Locking Ring
Barbed plugs and sockets insert into tubing and secure with a clamp.
| For Tube ID | Color | Clarity | Max. Pressure | Temp. Range, °F | Locking Ring Included | Pkg. Qty. | Pkg. | |
Polycarbonate Plastic | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/16" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | With Locking Ring | 10 | 000000000 | 00000 |
| 3/32" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | With Locking Ring | 10 | 000000000 | 0000 |
| 1/8" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | With Locking Ring | 10 | 000000000 | 0000 |
| 5/32" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | With Locking Ring | 10 | 000000000 | 0000 |
| 3/16" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | With Locking Ring | 10 | 000000000 | 0000 |
| 1/4" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | With Locking Ring | 10 | 000000000 | 0000 |
Straight Sockets, Barbed Tube
Barbed plugs and sockets insert into tubing and secure with a clamp.
| For Tube ID | Color | Clarity | Max. Pressure | Temp. Range, °F | Pkg. Qty. | Pkg. | |
Polycarbonate Plastic | |||||||
|---|---|---|---|---|---|---|---|
| 1/16" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | 10 | 000000000 | 00000 |
| 3/32" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | 10 | 000000000 | 0000 |
| 1/8" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | 10 | 000000000 | 0000 |
| 5/32" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | 10 | 000000000 | 0000 |
| 3/16" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | 10 | 000000000 | 0000 |
| 1/4" | Clear | Clear | 40 psi @ 72° F | -20° to 200° F | 10 | 000000000 | 0000 |