Tube Fittings | McMaster-Carr

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EAR99

For Tube Hardness

Durometer 70A to Durometer 85A

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9 Products

About Measuring Fittings

Measure the threaded ends of your fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Plastic Quick-Disconnect Tube Couplings for Air and Water

Lighter in weight than their metal counterparts, these quick-disconnect couplings are made of acetal plastic. They are moisture resistant, so they won’t absorb water and lose strength, even in high-humidity environments. A complete coupling consists of a plug and socket; choose a set for both, or select a plug and socket separately. Because they're quick disconnect, they're helpful for lines you frequently need to access.

Latch-lock sockets connect and disconnect with just one hand. Join sockets with a push and disconnect sockets by pressing the latch.

Plugs 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.

Plugs, Barbed Tube

Temperature Range: -40° to 180° F
Tubing: Use with soft or firm (Durometer 70A-85A) polyurethane rubber

Barbed plugs and sockets insert into tubing. Those with a collar do not require a clamp and limit the size of the tubing to a maximum of 1/8" OD.

Open Flow
For Tube ID	Coupling Size	Plug OD	Barbed Connection Type	Material	Color	Max. Pressure		Each
1/16"	3/32	1/4"	Collar	Acetal Plastic	White	100 psi @ 72° F	51605K11	00000
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	5012K24	0000
With Shut-Off
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	5012K43	00000

Through-Wall Plugs, Barbed Tube

Temperature Range: -40° to 180° F
Tubing: Use with soft or firm (Durometer 70A-85A) polyurethane rubber

Barbed plugs and sockets insert into tubing. Those with a collar do not require a clamp and limit the size of the tubing to a maximum of 1/8" OD.

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.

Open Flow
For Tube ID	Coupling Size	Plug OD	Barbed Connection Type	Material	Color	Max. Pressure	For Hole Dia.	For Max. Wall Thick.		Each
1/16"	3/32	1/4"	Collar	Acetal Plastic	White	100 psi @ 72° F	7/16"	13/64"	51605K15	00000
With Shut-Off
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	1/2"	19/64"	5012K52	00000

Sockets, Barbed Tube

Latch-Lock

Temperature Range: -40° to 180° F
Tubing: Use with soft or firm (Durometer 70A-85A) polyurethane rubber

Barbed plugs and sockets insert into tubing. Those with a collar do not require a clamp and limit the size of the tubing to a maximum of 1/8" OD.

Open Flow
For Tube ID	Coupling Size	For Plug OD	Barbed Connection Type	Material	Color	Max. Pressure	Socket Locking Type		Each
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	Latch	5012K18	00000
With Shut-Off
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	Latch	5012K37	00000

Through-Wall Sockets, Barbed Tube

Latch-Lock

Temperature Range: -40° to 180° F
Tubing: Use with soft or firm (Durometer 70A-85A) polyurethane rubber

Barbed plugs and sockets insert into tubing. Those with a collar do not require a clamp and limit the size of the tubing to a maximum of 1/8" OD.

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.

Open Flow
For Tube ID	Coupling Size	For Plug OD	Barbed Connection Type	Material	Color	Max. Pressure	For Hole Dia.	For Max. Wall Thick.	Socket Locking Type		Each
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	1/2"	0.4"	Latch	5012K14	000000
With Shut-Off
1/16"	1/8	5/16"	Collar	Acetal Plastic	White	100 psi @ 72° F	1/2"	0.4"	Latch	5012K33	00000