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.
More
Color/Shape-Match Quick-Disconnect Hose Couplings for Air and Water
Couplings are color coded by shape so you can’t mix hose lines. Only plugs and sockets of the same color and coupling size will fit together. A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them if you need frequent access to a line. Plugs and sockets are 303 stainless steel for good corrosion resistance.
Plugs are also known as nipples.
Sockets have a shut-off valve that stops the flow when the coupling is separated, so air or water won’t leak from the line. They are push-to-connect style. To connect, push the plug into the socket until you hear a click. To disconnect, slide the sleeve on the socket forward until the plug ejects.
Note: To ensure a correct fit, make sure that the plug and socket have the same color and coupling size.
- Maximum Pressure: 500 psi @ 72° F
- Maximum Vacuum: 28 in. of Hg @ 72° F
- Temperature Range: 0° to 210° F
Plug Tip | ||||||||
|---|---|---|---|---|---|---|---|---|
| Coupling Size | Lg. | Dia. | Pipe Size | Thread Type | Band Material | Plug Shape | Each | |
Blue Band | ||||||||
303 Stainless Steel | ||||||||
| 1/4 | 3/16" | 7/16" | 1/4 | NPT | Polyolefin Plastic | Round | 8636T234 | 000000 |
| 3/8 | 7/32" | 1/2" | 3/8 | NPT | Polyolefin Plastic | Round | 8636T314 | 00000 |
Green Band | ||||||||
303 Stainless Steel | ||||||||
| 1/4 | 3/16" | 7/16" | 1/4 | NPT | Polyolefin Plastic | Round | 8636T239 | 00000 |
| 3/8 | 7/32" | 1/2" | 3/8 | NPT | Polyolefin Plastic | Round | 8636T312 | 00000 |
Red Band | ||||||||
303 Stainless Steel | ||||||||
| 1/4 | 3/16" | 7/16" | 1/4 | NPT | Polyolefin Plastic | Round | 8636T261 | 00000 |
| 3/8 | 7/32" | 1/2" | 3/8 | NPT | Polyolefin Plastic | Round | 8636T315 | 00000 |
- Maximum Pressure: 500 psi @ 72° F
- Maximum Vacuum: 28 in. of Hg @ 72° F
- Temperature Range: 0° to 210° F
For Plug Tip | ||||||||
|---|---|---|---|---|---|---|---|---|
| Coupling Size | Lg. | Dia. | Pipe Size | Thread Type | Band Material | For Plug Shape | Each | |
Blue Band | ||||||||
303 Stainless Steel | ||||||||
| 1/4 | 3/16" | 7/16" | 1/4 | NPT | Polyolefin Plastic | Round | 8636T199 | 000000 |
| 3/8 | 7/32" | 1/2" | 3/8 | NPT | Polyolefin Plastic | Round | 8636T305 | 00000 |
Green Band | ||||||||
303 Stainless Steel | ||||||||
| 1/4 | 3/16" | 7/16" | 1/4 | NPT | Polyolefin Plastic | Round | 8636T198 | 00000 |
| 3/8 | 7/32" | 1/2" | 3/8 | NPT | Polyolefin Plastic | Round | 8636T266 | 00000 |
Red Band | ||||||||
303 Stainless Steel | ||||||||
| 1/4 | 3/16" | 7/16" | 1/4 | NPT | Polyolefin Plastic | Round | 8636T238 | 00000 |
| 3/8 | 7/32" | 1/2" | 3/8 | NPT | Polyolefin Plastic | Round | 8636T311 | 00000 |
Keyed and Color-Coded High-Pressure
Quick-Disconnect Tube Couplings for Air
Prevent mixing the wrong high-pressure lines—these couplings are designed to only connect with a plug or socket of the same color. They’re safe to use with high-pressure lines up to 250 psi. Made of chrome-plated brass, these couplings have excellent corrosion resistance.
To connect the coupling, push the plug into the socket. To disconnect, press the latch on the socket and remove the plug. Barbed plugs and sockets insert into tubing and secure with a clamp.
Note: For a complete coupling, order a plug and a socket with the same coupling size and strip color.
- Temperature Range: -40° to 180° F
- Tubing: Use with soft or firm (Durometer 70A-80A) polyurethane rubber
Open flow plugs give you higher flow rates than valves with shut-off flow control. They also minimize pressure drops across the connection. For the best flow rates, pair an open flow plug with an open flow socket.
Open Flow | |||||||
|---|---|---|---|---|---|---|---|
| For Tube ID | Coupling Size | Plug OD | Material | Strip Color | Max. Pressure | Each | |
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Blue | 250 psi @ 72° F | 5478K825 | 000000 |
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Orange | 250 psi @ 72° F | 5478K823 | 00000 |
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Yellow | 250 psi @ 72° F | 5478K824 | 00000 |
| 1/4" | 1/8 | 5/16" | Chrome-Plated Brass | Blue | 250 psi @ 72° F | 5478K828 | 00000 |
- Temperature Range: -40° to 180° F
- Tubing: Use with soft or firm (Durometer 70A-80A) polyurethane rubber
Also known as bulkhead couplings or panel-mount couplings, through-wall sockets mount through your wall or panel to create an inlet or outlet.
Open flow sockets give you higher flow rates than those with shut-off flow control. They also minimize pressure drops across the connection. For the best flow rates, pair an open flow socket with an open flow plug.
Sockets with a shut-off valve stop the flow when the coupling is separated, so air won’t leak from your line.
| For Tube ID | Coupling Size | For Plug OD | Material | Strip Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
Open Flow | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Blue | 250 psi @ 72° F | 1/2" | 1/2" | 5478K868 | 000000 |
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Orange | 250 psi @ 72° F | 1/2" | 1/2" | 5478K866 | 00000 |
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Yellow | 250 psi @ 72° F | 1/2" | 1/2" | 5478K867 | 00000 |
With Shut-Off | |||||||||
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Blue | 250 psi @ 72° F | 1/2" | 1/2" | 5478K874 | 00000 |
| 1/8" | 1/8 | 5/16" | Chrome-Plated Brass | Orange | 250 psi @ 72° F | 1/2" | 1/2" | 5478K873 | 00000 |
| 1/4" | 1/8 | 5/16" | Chrome-Plated Brass | Blue | 250 psi @ 72° F | 1/2" | 1/2" | 5478K876 | 00000 |
| 1/4" | 1/8 | 5/16" | Chrome-Plated Brass | Orange | 250 psi @ 72° F | 1/2" | 1/2" | 5478K875 | 00000 |