Inert Gas Cocks | McMaster-Carr

	Pipe Size Pipe Size

1/8

1/4

3/8

1/2

	Thread Type Thread Type

NPT

NPTF

	Body Material Body Material

Brass

Stainless Steel

	Connection Type Connection Type


Pipe	Tube

Spout	Drain

	Connection Style Connection Style


Threaded	Barbed

	Handle Style Handle Style


Lever	T-Handle

Knob

	For Use With For Use With

	Gender Gender

Male

Female

	Maximum Pressure Maximum Pressure

	Valve Type Valve Type

Stop Cock

Ball

	Maximum Temperature Maximum Temperature

	Inlet Pipe Size Inlet Pipe Size

	For Tube ID For Tube ID

1/4"

3/8"

	Seal Material Seal Material

Plastic

Brass

Rubber

	Fitting Type Fitting Type

Adapter

Connector

	Minimum Temperature Minimum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Overall Length Overall Length

	Overall Height Overall Height

1 1/2"

1 9/16"

2 1/16"

	End-to-End Length End-to-End Length

	Flow Coefficient (Cv) Flow Coefficient (Cv)

1.4

Not Rated

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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68 Products

About On/Off Valves

Compact Threaded On/Off Valves

Install these low-profile valves in tight spots.

316 stainless steel valves have the best corrosion resistance.

Short lever handles, T-handles, and screwdriver-operated handles resist accidental movement when snagged or bumped.

Brass Body with Lever Handle

Female × Female

Male × Female

Male × Male

Male × Drain

Male × Spout

Valve Type: Stop Cock
For Use With: Air
Seal Material: Brass

NPT Female × NPT Female
Pipe Size	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
1/8	80 psi @ 500° F	35° to 500°	1 5/8"	00000000	000000
1/4	80 psi @ 500° F	35° to 500°	1 5/8"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	1 7/8"	00000000	00000
1/2	80 psi @ 500° F	35° to 500°	2"	00000000	00000
NPT Male × NPT Female
1/8	80 psi @ 500° F	35° to 500°	1 13/16"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	1 7/8"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	1 7/8"	00000000	00000
1/2	80 psi @ 500° F	35° to 500°	1 15/16"	00000000	00000
NPT Male × NPT Male
1/8	80 psi @ 500° F	35° to 500°	1 13/16"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	2 1/8"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	2 3/8"	00000000	00000
1/2	80 psi @ 500° F	35° to 500°	2 3/16"	00000000	00000
NPT Male × Drain
1/8	80 psi @ 500° F	35° to 500°	1 11/16"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	1 13/16"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	2"	00000000	00000
1/2	80 psi @ 500° F	35° to 500°	2"	00000000	00000
NPT Male × Spout
1/8	80 psi @ 500° F	35° to 500°	2 1/4"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	2 1/4"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	2 1/4"	00000000	00000
1/2	80 psi @ 500° F	35° to 500°	2 3/8"	00000000	00000

Brass Body with T-Handle

Female × Female

Male × Female

Male × Male

Male × Drain

Male × Spout

Valve Type: Stop Cock
For Use With: Air
Seal Material: Brass

NPT Female × NPT Female
Pipe Size	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
1/8	80 psi @ 500° F	35° to 500°	1 5/8"	00000000	000000
1/4	80 psi @ 500° F	35° to 500°	1 5/8"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	1 7/8"	00000000	00000
NPT Male × NPT Female
1/8	80 psi @ 500° F	35° to 500°	1 13/16"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	1 7/8"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	1 7/8"	00000000	00000
NPT Male × NPT Male
1/8	80 psi @ 500° F	35° to 500°	1 13/16"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	2 1/8"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	2 3/8"	00000000	00000
NPT Male × Drain
1/8	80 psi @ 500° F	35° to 500°	1 11/16"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	1 13/16"	00000000	00000
3/8	80 psi @ 500° F	35° to 500°	2"	00000000	00000
1/2	80 psi @ 500° F	35° to 500°	2"	00000000	00000
NPT Male × Spout
1/8	80 psi @ 500° F	35° to 500°	2 1/4"	00000000	00000
1/4	80 psi @ 500° F	35° to 500°	2 1/4"	00000000	00000

316 Stainless Steel Body with Lever Handle

Female × Spout

Male × Spout

Valve Type: Stop Cock
For Use With: Air, Water
Seal Material: PTFE Plastic

NPT Female × Spout
Pipe Size	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
1/8	150 psi @ 300° F	0° to 300°	2 13/16"	0000000	000000
1/4	150 psi @ 300° F	0° to 300°	2 13/16"	0000000	00000
3/8	150 psi @ 300° F	0° to 300°	2 13/16"	0000000	00000
NPT Male × Spout
1/4	150 psi @ 300° F	0° to 300°	2 13/16"	0000000	00000
3/8	150 psi @ 300° F	0° to 300°	2 13/16"	0000000	00000
1/2	150 psi @ 300° F	0° to 300°	2 13/16"	0000000	00000

316 Stainless Steel Body with T-Handle

Female × Female

Female × Male

Male × Male

Valve Type: Stop Cock
For Use With: Air, Oil, Water
Seal Material: PTFE Plastic

NPT Female × NPT Female
Pipe Size	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
1/8	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	000000
1/4	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
3/8	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
NPT Female × NPT Male
1/8	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
1/4	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
3/8	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
NPT Male × NPT Male
1/8	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
1/4	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000

On/Off Valves with Barbed Fittings

These valves have barbs that grip onto tubing, providing a secure hold.

Nickel-plated brass valves are more corrosion resistant than plain brass valves.

316 stainless steel valves have the best corrosion resistance.

T-handle valves resist accidental movement when snagged or bumped. They are also known as stop cocks.

Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.

Lever Handle

Barbed × Barbed

NPTF Female × Barbed

NPTF Male × Barbed

Valve Type: Ball
For Use With: Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon

Brass Body
Pipe Size	For Tube ID	Flow Coefficient (Cv)	Max. Pressure	Temperature Range, °F	Seal Material	End-to-End Lg.		Each
Barbed × Barbed
__	1/4"	1.4	500 psi @ 180° F	35° to 180°	Buna-N Rubber	2 3/4"	0000000	000000
NPTF Female × Barbed
1/4	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 5/16"	0000000	00000
NPTF Male × Barbed
1/8	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 9/16"	0000000	00000
1/4	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 5/8"	0000000	00000
3/8	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 11/16"	0000000	00000
1/2	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 13/16"	0000000	00000
Nickel-Plated Brass Body
NPTF Male × Barbed
1/8	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 9/16"	0000000	00000
1/4	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 5/8"	0000000	00000
3/8	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 11/16"	0000000	00000
1/2	3/8"	1.4	500 psi @ 180° F	35° to 180°	PTFE Plastic	2 13/16"	0000000	00000

T-Handle

NPT Male × Barbed

Valve Type: Stop Cock
For Use With: Air, Water
Seal Material: PTFE Plastic

316 Stainless Steel Body
Pipe Size	For Tube ID	Max. Pressure	Temperature Range, °F	End-to-End Lg.		Each
NPT Male × Barbed
1/8	3/8"	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	000000
1/4	3/8"	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
3/8	3/8"	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000
1/2	3/8"	150 psi @ 300° F	0° to 300°	2 1/4"	0000000	00000

Easy-Grip Drainage Valves

The large knob makes these drainage valves easy to grip. They're also known as stop cocks.

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

Inlet			Outlet
Pipe Size	Thread Type	Gender	Connection Type	Gender	For Use With	Max. Pressure	Temp. Range, °F	Port-to-Port Lg.	Body Material		Each
1/2	NPT	Male	Unthreaded Hole	Male	Water, Oil	250 psi @ 400° F	32° to 400°	1"	Brass	0000000	000000
3/4	NPT	Male	Unthreaded Hole	Male	Water, Oil	250 psi @ 400° F	32° to 400°	1"	Brass	000000	00000

Drainage Valves

Removable T-Handle

Also known as stop cocks, install these valves on your tank for easy draining.

Valves with removable handle can be disassembled for cleaning.

Inlet			Outlet
Pipe Size	Thread Type	Gender	Connection Type	For Use With	Features	Max. Pressure	Temp. Range, °F	Ht.	Body Material		Each
T-Handle
Internal Seal
1/8	NPT	Male	Unthreaded Hole	Water, Oil, Inert Gas	Removable Handle	150 psi @ 250° F	-65° to 250°	1 9/16"	Brass	000000	00000
1/4	NPT	Male	Unthreaded Hole	Water, Oil, Inert Gas	Removable Handle	150 psi @ 250° F	-65° to 250°	1 11/16"	Brass	000000	00000
3/8	NPT	Male	Unthreaded Hole	Water, Oil, Inert Gas	Removable Handle	150 psi @ 250° F	-65° to 250°	1 13/16"	Brass	000000	00000