Quick-Turn Tube Plugs | McMaster-Carr

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	Connection Style Connection Style	Show

	Quick Turn

	Connection Style Connection Style	Hide

	Type Type


Plug	Cap

Adapter	Connector

	Material Material

Brass

Plastic

Stainless Steel

	Quick-Turn Component Quick-Turn Component


Plug	Socket

	System of Measurement System of Measurement

Inch

Metric

	For Tube ID For Tube ID

	Shape Shape

	Cap/Plug
	Straight

	Connection Type Connection Type


Tube	Pipe

	For Use With For Use With

	Gender Gender

Male

Female

	Thread Type Thread Type

Metric

NPT

UNF

	Color Color

	White
	Clear
	Gray

	For Tube Material For Tube Material

Rubber

Plastic

Stainless Steel

	Pipe Size Pipe Size

1/16

1/8

1/4

	Thread Size Thread Size

10-32

1/4"-28

	Number of Barbs Number of Barbs

	Single
	Multiple

	Length Length

	Maximum Temperature Maximum Temperature

Less than 200° F

200° to 249° F

250° to 499° F

	Minimum Temperature Minimum Temperature

-249° to -50° F

-24° to 0° F

Greater than 0° F

	Flow Control Flow Control

Open

With Shut-Off

	Clarity Clarity

Clear

Semi-Clear

Opaque

	Maximum Pressure Maximum Pressure

30 psi @ 72° F

40 psi @ 72° F

120 psi @ 72° F

	Maximum Vacuum Maximum Vacuum

20 in. of Hg @ 72° F

Not Rated

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

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82 Products

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.

For Use With: Polycarbonate Plastic: Air
Nylon Plastic, PVDF Plastic: Air, Water
Polypropylene Plastic: Water
Temperature Range: Nylon Plastic, Polycarbonate Plastic: -20° to 200° F
Polypropylene Plastic, PVDF 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.

Straight Plugs, Barbed Tube

Barbed plugs and sockets insert into tubing and secure with a clamp.

For Tube ID	Material	Color	Clarity	Max. Pressure	Pkg. Qty.		Pkg.
1/16"	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	00000
1/16"	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
1/16"	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000
3/32"	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
3/32"	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
3/32"	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000
1/8"	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
1/8"	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
1/8"	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000
5/32"	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
5/32"	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
5/32"	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000
3/16"	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
3/16"	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
3/16"	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000
1/4"	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
1/4"	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
1/4"	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000

Straight Plugs, Male Threaded Pipe

NPT Threads
Pipe Size	Thread Size	Material	Color	Clarity	Max. Pressure	Pkg. Qty.		Pkg.
1/8	__	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	00000
1/8	__	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	00000
1/4	__	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
1/4	__	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	00000
UN/UNF (SAE) Threads
__	10-32	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
__	10-32	Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
__	10-32	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000
__	1/4"-28	Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	0000
__	1/4"-28	Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000

Straight Plug-to-Socket Adapters, Quick-Turn Tube

Material	Color	Clarity	Max. Pressure	Pkg. Qty.		Pkg.
Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	00000
Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000

Caps for Plugs

Material	Color	Clarity	Max. Pressure	Pkg. Qty.		Pkg.
Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	00000
Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000

End Plugs

Material	Color	Clarity	Max. Pressure	Pkg. Qty.		Pkg.
Nylon Plastic	White	Opaque	40 psi @ 72° F	10	000000000	00000
Polycarbonate Plastic	Clear	Clear	40 psi @ 72° F	10	000000000	0000
Polypropylene Plastic	White	Semi-Clear	40 psi @ 72° F	10	000000000	0000

Stainless Steel Quick-Turn Tube Couplings for Air

Made of stainless steel, these couplings stand up to wet 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.

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.

Plugs, Barbed Tube

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.

		303 Stainless Steel		316 Stainless Steel
For Tube ID	Max. Pressure		Each		Each
1/4"-5/16"	30 psi @ 72° F	0000000	000000	0000000	000000

Plugs, Male Threaded Pipe

Temperature Range: 32° to 300° F

			303 Stainless Steel		316 Stainless Steel
Pipe Size	Thread Size	Max. Pressure		Each		Each
NPT Threads
1/8	__	30 psi @ 72° F	000000	00	0000000	000000
1/4	__	30 psi @ 72° F	000000	00	0000000	00000
UN/UNF (SAE) Threads
__	10-32	30 psi @ 72° F	000000	00	0000000	00000
__	1/4"-28	30 psi @ 72° F	0000000	000000	0000000	00000

Plugs, Connector

Temperature Range: 32° to 300° F
Tubing: Use with soft or firm (Durometer 35A-95A) polyurethane rubber, PVC plastic or silicone rubber

	303 Stainless Steel		316 Stainless Steel
Max. Pressure		Each		Each
30 psi @ 72° F	0000000	000000	0000000	000000

Plugs for Sockets

Temperature Range: 32° to 300° F

	303 Stainless Steel		316 Stainless Steel
Max. Pressure		Each		Each
30 psi @ 72° F	0000000	000000	0000000	000000

Caps for Plugs

Temperature Range: 32° to 300° F

	316 Stainless Steel
Max. Pressure		Each
30 psi @ 72° F	0000000	000000

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.

Plugs, Barbed Tube

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.

For Tube ID	Material	Max. Pressure		Each
1/16"-3/32"	Nickel-Plated Brass	30 psi @ 72° F	000000000	00000
1/8"-3/16"	Nickel-Plated Brass	30 psi @ 72° F	000000000	0000
1/4"-5/16"	Nickel-Plated Brass	30 psi @ 72° F	000000000	0000

Plugs, Male Threaded Pipe

Temperature Range: -100° to 300° F

NPT Threads
Pipe Size	Thread Size	Thread Pitch, mm	Material	Max. Pressure	Features		Each
1/16	__	__	Nickel-Plated Brass	30 psi @ 72° F	__	00000000	00000
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	0000
__	M6	1	Nickel-Plated Brass	30 psi @ 72° F	Acrylic Thread Sealant	00000000	0000
__	M8	1	Nickel-Plated Brass	30 psi @ 72° F	Acrylic Thread Sealant	00000000	0000
UN/UNF (SAE) Threads
__	10-32	__	Nickel-Plated Brass	30 psi @ 72° F	__	000000000	0000
__	1/4"-28	__	Nickel-Plated Brass	30 psi @ 72° F	__	00000000	0000

Plugs, Female Threaded Pipe

Temperature Range: -100° to 300° F

NPT Threads
Pipe Size	Thread Size	Material	Max. Pressure		Each
1/16	__	Nickel-Plated Brass	30 psi @ 72° F	00000000	00000
1/8	__	Nickel-Plated Brass	30 psi @ 72° F	00000000	0000
1/4	__	Nickel-Plated Brass	30 psi @ 72° F	00000000	0000
UN/UNF (SAE) Threads
__	10-32	Nickel-Plated Brass	30 psi @ 72° F	00000000	0000
__	1/4"-28	Nickel-Plated Brass	30 psi @ 72° F	00000000	0000

Plugs, Connector

Temperature Range: -100° to 300° F
Tubing: Use with soft or firm (Durometer 35A-95A) polyurethane rubber, PVC plastic or silicone rubber

Material	Max. Pressure		Each
Nickel-Plated Brass	30 psi @ 72° F	000000000	00000

Caps for Plugs

Temperature Range: -100° to 300° F

		Caps		Plugs
Material	Max. Pressure		Each		Each
Nickel-Plated Brass	30 psi @ 72° F	000000000	00000	000000000	00000

Plastic Quick-Turn Tube Couplings with Shut-Off for Air and Water

Temperature Range: -50° to 150° F
Tubing: Use with firm or soft (Durometer 35A-85A) PVC plastic or silicone rubber, except fittings with pipe end

A built-in shut-off valve stops the flow when the coupling is separated, so air or water won’t leak from your line. Also known as luer lock couplings, these 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. Couplings have a universal connection, so the plugs will connect to any of the sockets, regardless of the pipe or tube size. They are nylon, which is lightweight with good impact and abrasion resistance.

Note: For a complete coupling, order a plug and a socket.

For technical drawings and 3-D models, click on a part number.

Plugs, Barbed Tube

Barbed plugs and sockets insert into tubing and secure with a clamp.

For Tube ID	Material	Color	Max. Pressure		Each
1/16"	Nylon Plastic	Gray	120 psi @ 72° F	0000000	00000
1/8"	Nylon Plastic	Gray	120 psi @ 72° F	0000000	0000
1/4"	Nylon Plastic	Gray	120 psi @ 72° F	0000000	0000

Plugs, Male Threaded Pipe

NPT Threads
Pipe Size	Material	Color	Max. Pressure		Each
1/8	Nylon Plastic	Gray	120 psi @ 72° F	0000000	00000
1/4	Nylon Plastic	Gray	120 psi @ 72° F	0000000	0000

Quick-Turn Couplings for Plastic and Rubber Tubing—Chemicals

Also known as luer lock couplings, these 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. Made of PVDF (also known as Kynar), they have excellent chemical resistance.

Note: For a complete coupling, order a plug and a socket.

For technical drawings and 3-D models, click on a part number.

Straight Plugs, Barbed Tube

For Use With: Acetic Acid, Bleach, Nitric Acid
Temperature Range: 35° to 150° F
Tubing: Use with soft (Durometer 40A-65A) PVC plastic or silicone rubber

Barbed plugs and sockets insert into tubing and secure with a clamp.

					Open Flow
For Tube ID	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/16"	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	000000
3/32"	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000
1/8"	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000
5/32"	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000
3/16"	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000
1/4"	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000

Straight Plugs, Male Threaded Pipe

For Use With: Acetic Acid, Bleach, Nitric Acid
Temperature Range: 35° to 150° F

					Open Flow
Thread Size	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
UN/UNF (SAE) Threads
1/4"-28	PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	000000

Caps for Plugs

For Use With: Acetic Acid, Bleach, Nitric Acid
Temperature Range: 35° to 150° F
Tubing: Use with soft (Durometer 40A-65A) PVC plastic or silicone rubber

Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000

Plugs for Sockets

For Use With: Acetic Acid, Bleach, Nitric Acid
Temperature Range: 35° to 150° F

Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
PVDF Plastic	Clear	40 psi @ 72° F	10	000000000	00000

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.

			Plug
For Tube OD	Material	Max. Pressure		Each
1/64", 1/32", 3/64", 1/16", 5/64"	316 Stainless Steel	30 psi @ 72° F	0000000	000000

How to Identify and Measure Fittings

Plastic Quick-Turn Tube Couplings for Air and Water

Stainless Steel Quick-Turn Tube Couplings for Air

Brass Quick-Turn Tube Couplings for Air

Plastic Quick-Turn Tube Couplings with Shut-Off for Air and Water

Quick-Turn Couplings for Plastic and Rubber Tubing—Chemicals

Quick-Turn Couplings for Stainless Steel Tubing