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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Stainless Steel Luer Lock Tube Couplings for Air and Water
Use these luer lock couplings to quickly connect low-pressure air and water lines. Made of stainless steel, they’re more durable than plastic couplings. Luer lock connections are universal, so you can connect any plug and socket to each other, regardless of the pipe or tube size. You can also connect them to syringes and needles. These couplings have a compact body, so they’ll fit in tight spaces. All are open-flow style, so there is no shut-off valve to stop the flow when the coupling is separated.
303 stainless steel couplings have very good corrosion resistance.
316 stainless steel couplings have excellent corrosion resistance.
Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: 32° to 300° F
- Tubing: Use with soft or firm (Durometer 35A-95A) polyurethane rubber, PVC plastic or silicone rubber
Barbed plugs and sockets insert into tubing and secure with a clamp.
| For Tube ID | Max. Pressure | Each | |
316 Stainless Steel  | |||
|---|---|---|---|
| 7/32" | 30 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
| Pipe Size | Thread Size | Max. Pressure | Each | |
NPT Threads | ||||
|---|---|---|---|---|
316 Stainless Steel | ||||
| 1/8 | __ | 30 psi @ 72° F | 0000000 | 000000 |
| 1/4 | __ | 30 psi @ 72° F | 0000000 | 00000 |
UN/UNF (SAE Straight) Threads | ||||
303 Stainless Steel | ||||
| __ | 1/4"-28 | 30 psi @ 72° F | 0000000 | 00000 |
316 Stainless Steel | ||||
| __ | 10-32 | 30 psi @ 72° F | 0000000 | 00000 |
| __ | 1/4"-28 | 30 psi @ 72° F | 0000000 | 00000 |
- Temperature Range: 32° to 300° F
| Thread Size | Max. Pressure | Each | |
UN/UNF (SAE Straight) Threads | |||
|---|---|---|---|
316 Stainless Steel | |||
| 10-32 | 45 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
| Max. Pressure | Each | |
316 Stainless Steel | ||
|---|---|---|
| 30 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
| Max. Pressure | Each | |
316 Stainless Steel | ||
|---|---|---|
| 30 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
- Tubing: Use with soft or firm (Durometer 35A-95A) polyurethane rubber, PVC plastic or silicone rubber
Barbed plugs and sockets insert into tubing and secure with a clamp.
| For Tube ID | Max. Pressure | Each | |
316 Stainless Steel | |||
|---|---|---|---|
| 7/32" | 30 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
| Pipe Size | Thread Size | Max. Pressure | Each | |
NPT Threads | ||||
|---|---|---|---|---|
316 Stainless Steel | ||||
| 1/8 | __ | 30 psi @ 72° F | 0000000 | 000000 |
| 1/4 | __ | 30 psi @ 72° F | 0000000 | 00000 |
UN/UNF (SAE Straight) Threads | ||||
303 Stainless Steel | ||||
| __ | 1/4"-28 | 30 psi @ 72° F | 0000000 | 00000 |
316 Stainless Steel | ||||
| __ | 10-32 | 30 psi @ 72° F | 0000000 | 00000 |
| __ | 1/4"-28 | 30 psi @ 72° F | 0000000 | 00000 |
- Temperature Range: 32° to 300° F
| Pipe Size | Thread Size | Thread Pitch, mm | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
316 Stainless Steel | |||||
| 1/8 | __ | __ | 45 psi @ 72° F | 0000000 | 000000 |
| 1/4 | __ | __ | 45 psi @ 72° F | 0000000 | 00000 |
Metric Threads | |||||
303 Stainless Steel | |||||
| __ | M6 | 1 | 30 psi @ 72° F | 0000000 | 00000 |
316 Stainless Steel | |||||
| __ | M6 | 1 | 30 psi @ 72° F | 0000000 | 00000 |
UN/UNF (SAE Straight) Threads | |||||
316 Stainless Steel | |||||
| __ | 10-32 | __ | 45 psi @ 72° F | 0000000 | 00000 |
| __ | 1/4"-28 | __ | 45 psi @ 72° F | 0000000 | 00000 |
- Temperature Range: 32° to 300° F
| Thread Size | Max. Pressure | Each | |
UN/UNF (SAE Straight) Threads | |||
|---|---|---|---|
316 Stainless Steel | |||
| 10-32 | 45 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
| Max. Pressure | Each | |
316 Stainless Steel | ||
|---|---|---|
| 30 psi @ 72° F | 0000000 | 000000 |
- Temperature Range: 32° to 300° F
| Max. Pressure | Each | |
316 Stainless Steel | ||
|---|---|---|
| 30 psi @ 72° F | 0000000 | 000000 |