How to Identify and Measure Fittings
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Quick-Turn 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
Also known as luer lock couplings, these consist of a plug and socket that connect to small-diameter tubing with a half turn. They have a compact body for easy installation in tight spaces. Insert tubing into the plug or socket and tighten the nut to form a seal. Couplings are open-flow style, so there is no shut-off valve to stop the flow when the coupling is separated. They are 316 stainless steel for 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.
Plastic Quick-Disconnect Tube Couplings for Air and Water
Lighter in weight than their metal counterparts, these quick-disconnect couplings are plastic. They consist of a plug and a socket that allow you to frequently connect and disconnect your line.
Acetal plugs and sockets are moisture resistant, so they won’t absorb water and lose strength, even in high-humidity environments. Plug and Sockets with shut-off have a valve to stop the flow when the coupling is separated, so air or water won’t spill from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -40° to 180° F
- Tubing: Use with nylon plastic or polyethylene plastic, see table for hardness
For Tube | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Coupling Size | Plug OD | For Tube ID, mm | For Tube OD | Material | Color | Max. Pressure | Hardness Rating | Hardness | Each | |
Open Flow | ||||||||||
| 1/8 | 5/16" | __ | 5/32" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 00000000 | 00000 |
| 1/8 | 5/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 0000 |
| 1/8 | 5/16" | 2 | 4mm | Acetal Plastic | White | 100 psi @ 72° F | __ | __ | 00000000 | 0000 |
| 1/4 | 7/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 00000000 | 0000 |
| 1/4 | 7/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 0000 |
With Shut-Off | ||||||||||
| 1/8 | 5/16" | __ | 5/32" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 00000000 | 00000 |
| 1/8 | 5/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 00000 |
| 1/8 | 5/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 00000 |
| 1/8 | 5/16" | 2 | 4mm | Acetal Plastic | White | 100 psi @ 72° F | __ | __ | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 00000000 | 00000 |
| 1/4 | 7/16" | __ | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | Firm, Hard | Durometer 85A-60D | 0000000 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Through-wall plugs and sockets are also known as bulkhead and panel-mount plugs and sockets; they mount through your wall or panel to create an inlet or outlet.
| Coupling Size | Plug OD | For Tube OD | Material | Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
Open Flow | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 5/16" | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 1/2" | 19/64" | 00000000 | 000000 |
| 1/4 | 7/16" | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
With Shut-Off | |||||||||
| 1/8 | 5/16" | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 1/2" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 1/4" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Acetal Plastic | White | 100 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with nylon plastic or polyethylene plastic
Open Flow | ||||||||
|---|---|---|---|---|---|---|---|---|
| Coupling Size | Plug OD | For Tube ID, mm | For Tube OD | Material | Color | Max. Pressure | Each | |
| 1/8 | 5/16" | 2.5 | 4mm | Acetal Plastic | White | 100 psi @ 72° F | 00000000 | 00000 |
Brass Quick-Disconnect Tube Couplings for Air
- Temperature Range: 0° to 180° F
- Tubing: Use with hard polyethylene plastic or polypropylene plastic
An all-brass body gives these quick-disconnect couplings better durability than plastic quick-disconnect couplings. They’re nickel plated for very good corrosion resistance. Couplings consist of a plug and a socket that join with a latch, so you can easily connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch and remove the plug.
Plugs and sockets with shut-off have a valve to stop the flow when the coupling is separated, so air won’t leak from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Through-wall sockets are also known as bulkhead sockets and panel mount sockets; they mount through your wall or panel to create an inlet or outlet.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Compression plugs and sockets have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
Through-wall sockets are also known as bulkhead sockets and panel mount sockets; they mount through your wall or panel to create an inlet or outlet.
High-Pressure Quick-Disconnect Tube Couplings for Air
Not only do these chrome-plated brass couplings have excellent corrosion resistance, they also withstand pressures up to 250 psi. Couplings consist of a plug and a socket (sold separately) that join with a latch, so you can frequently connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch on the socket and remove the plug.
Plugs and Sockets with shut-off have a valve to stop the flow when the coupling is separated, so air won’t leak from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
- Temperature Range: -40° to 180° F
- Tubing: Use with firm or hard (Durometer 85A-60D) nylon plastic or polyethylene plastic
Through-wall plugs and sockets are also known as bulkhead and panel-mount plugs and sockets; they mount through your wall or panel to create an inlet or outlet.
| Coupling Size | Plug OD | For Tube OD | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
Open Flow | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/8 | 5/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 1/2" | 19/64" | 00000000 | 000000 |
| 1/4 | 7/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
With Shut-Off | ||||||||
| 1/8 | 5/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 1/2" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 1/4" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 19/64" | 00000000 | 00000 |
| 1/4 | 7/16" | 3/8" | Chrome-Plated Brass | 250 psi @ 72° F | 11/16" | 19/64" | 00000000 | 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. 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.
Brass Quick-Turn Tube Couplings for Air
An all-brass body gives these couplings better strength and durability than plastic quick-turn couplings. They have a nickel plating for extra protection against corrosive environments. 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, so they’re easy to fit 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.
Note: For a complete coupling, order a plug and a socket.
For technical drawings and 3-D models, click on a part number.
Quick-Disconnect Couplings for Plastic Tubing—Gasoline
- Temperature Range: 0° to 150° F
- Tubing: Use with firm (Durometer 45D) polyethylene or polypropylene plastic, except fittings with male threaded pipe connection
Couplings consist of a plug and a socket (sold separately) that join with a latch, so you can frequently connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch and remove the plug. Plugs and sockets are 316 stainless steel for excellent corrosion resistance.
Plugs and sockets with shut-off have a valve to stop the flow when the coupling is separated, so gasoline won’t spill from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
Compression plugs have a sleeve (ferrule) that bites into the tubing and forms a seal when you tighten the nut.
Quick-Disconnect Tube Couplings for Food and Beverage
- Temperature Range:
Acetal Plastic: -40° to 180° F
Polypropylene Plastic: 32° to 160° F - Tubing:
Barbed Fittings: Use with soft or firm (Durometer 65A-80A) polyurethane rubber
Compression Fittings: Use with hard or firm (Durometer 80A-60D) nylon or polyethylene plastic - Specifications Met: NSF/ANSI 169
Couplings consist of a plug and a socket (sold separately) that join with a latch, so you can frequently connect and disconnect your line. To connect, insert the plug into the socket; to disconnect, press the latch on the socket and remove the plug. They’re made of FDA-approved materials, including moisture-resistant plastic that won’t absorb liquid and lose strength, even in high-humidity food and beverage applications.
Plugs and sockets with shut-off have a valve to stop the flow when the coupling is separated, so fluid won’t spill from your line.
Note: For a complete coupling, order a plug and a socket with the same coupling size.
For technical drawings and 3-D models, click on a part number.
Compression plugs have a sleeve (ferrule) that compresses the tubing and forms a seal when you tighten the nut.
With Shut-Off | ||||||||
|---|---|---|---|---|---|---|---|---|
| Coupling Size | Plug OD | For Tube OD | Material | Color | Clarity | Max. Pressure | Each | |
| 1/4 | 7/16" | 1/4" | Acetal Plastic | White | Semi-Clear | 100 psi @ 72° F | 0000000 | 000000 |