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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Luer Lock Couplings for Stainless Steel Tubing
- For Use With: Air
- Temperature Range: 32° to 350° F
- Tubing: Use with 304/304L or 316/316L stainless steel
Quickly connect low-pressure stainless steel lines with these couplings. Made of 316 stainless steel, they have excellent corrosion resistance. They’re easier to install than yor-lok or compression couplings—just insert tubing and twist the nut to seal—but they can’t handle as much pressure. 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 are open-flow style, so there is no shut-off valve to stop the flow when the coupling is separated. They have a compact body for installation in tight spaces.
Note: For a complete coupling, order a plug and a socket.
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.
- 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.
- 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.
- 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 | ||
|---|---|---|
| 45 psi @ 72° F | 0000000 | 0000000 |
- Temperature Range: 32° to 300° F
| Max. Pressure | Each | |
316 Stainless Steel | ||
|---|---|---|
| 45 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.
- 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.
- 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 | ||
|---|---|---|
| 45 psi @ 72° F | 0000000 | 000000 |
Brass Luer Lock Tube Couplings for Air
Quickly connect low-pressure air lines with these luer lock couplings. Made of brass, they are stronger and more durable than plastic tube couplings. These couplings have a nickel plating for extra protection against corrosive environments. 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’re easy to 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.
Note: For a complete coupling, order a plug and a socket.
- Temperature Range: -100° 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.
- Temperature Range: -100° to 300° F
| Pipe Size | Thread Size | Thread Pitch, mm | Material | Max. Pressure | Features | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/16 | __ | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 00000000 | 000000 |
| 1/8 | __ | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 000000000 | 0000 |
| 1/4 | __ | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 000000000 | 0000 |
Metric Threads | |||||||
| __ | M5 | 0.8 | Nickel-Plated Brass | 30 psi @ 72° F | Acrylic Thread Sealant | 00000000 | 00000 |
| __ | M6 | 1 | Nickel-Plated Brass | 30 psi @ 72° F | Acrylic Thread Sealant | 00000000 | 00000 |
| __ | M8 | 1 | Nickel-Plated Brass | 30 psi @ 72° F | Acrylic Thread Sealant | 00000000 | 00000 |
UN/UNF (SAE Straight) Threads | |||||||
| __ | 10-32 | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 000000000 | 0000 |
| __ | 1/4"-28 | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 00000000 | 0000 |
- Temperature Range: -100° to 300° F
| Pipe Size | Thread Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 1/16 | __ | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 000000 |
| 1/8 | __ | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 00000 |
| 1/4 | __ | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 00000 |
UN/UNF (SAE Straight) Threads | |||||
| __ | 10-32 | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 0000 |
| __ | 1/4"-28 | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 0000 |
- Temperature Range: -100° 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.
- Temperature Range: -100° to 300° F
| Pipe Size | Thread Size | Thread Pitch, mm | Material | Max. Pressure | Features | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/16 | __ | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 00000000 | 000000 |
| 1/8 | __ | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 00000000 | 00000 |
| 1/4 | __ | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 00000000 | 00000 |
Metric Threads | |||||||
| __ | M5 | 0.8 | Nickel-Plated Brass | 30 psi @ 72° F | Acrylic Thread Sealant | 00000000 | 00000 |
| __ | M6 | 1 | Nickel-Plated Brass | 30 psi @ 72° F | Acrylic Thread Sealant | 00000000 | 00000 |
| __ | M8 | 1 | Nickel-Plated Brass | 30 psi @ 72° F | Acrylic Thread Sealant | 00000000 | 00000 |
UN/UNF (SAE Straight) Threads | |||||||
| __ | 10-32 | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 000000000 | 0000 |
| __ | 1/4"-28 | __ | Nickel-Plated Brass | 30 psi @ 72° F | __ | 00000000 | 0000 |
- Temperature Range: -100° to 300° F
| Thread Size | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| __ | 1/16 | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 000000 |
| __ | 1/8 | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 00000 |
| __ | 1/4 | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 00000 |
UN/UNF (SAE Straight) Threads | |||||
| 10-32 | __ | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 00000 |
| 1/4"-28 | __ | Nickel-Plated Brass | 30 psi @ 72° F | 00000000 | 00000 |
- Temperature Range: -100° to 300° F
| Material | Max. Pressure | Each | |
| Nickel-Plated Brass | 30 psi @ 72° F | 000000000 | 00000 |
- Temperature Range: -100° to 300° F
| Material | Max. Pressure | Each | |
| Nickel-Plated Brass | 30 psi @ 72° F | 000000000 | 00000 |