0.305"-32 Couplings | McMaster-Carr

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14 Products

Couplers for High-Pressure Fill Valves

Fill tanks and recharge struts—these couplers join hose to high-pressure fill valves with Schrader threads.

Some couplers meet SAE AS4395, an automotive industry standard for flared fitting dimensions.

70° elbow couplers are angled to access hard-to-reach valves.

Couplers with a shut-off valve let you control the flow of air by hand. When used with Schrader valves that have a core, the core depressor pin in these couplers press valves open to let air flow in.

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

Schrader Female Threaded Hose × NPT Threaded Pipe

70° Elbow, Schrader
Female Threaded Hose ×
NPT Female Threaded Pipe

90° Elbow, Schrader Female
Threaded Hose × NPT
Threaded Male Pipe

Inlet
Thread Size	Pipe Size	Outlet Gender	Material	Max. Pressure, psi	Temp. Range, °F	Features		Each
70° Elbow
0.305"-32	1/8	Female	Brass	3,000	-20° to 250°	__	000000	000000
90° Elbow with a Shut-Off Valve
0.305"-32	1/8	Male	Brass	3,000	-40° to 160°	Core Depressor Pin	000000	00000

Schrader Female Threaded Hose × UN/UNF Male Flared Tube

Straight, Schrader
Female Threaded Hose ×
UN/UNF Male Flared Tube

70° Elbow, Schrader
Female Threaded Hose ×
UN/UNF Male Flared Tube

90° Elbow, Schrader
Female Threaded Hose ×
UN/UNF Male Flared Tube

Inlet		Outlet
Thread Size	Material	Thread Size	Material	Flared Angle	For Tube OD	Material	Max. Pressure, psi	Temp. Range, °F	Features	Specifications Met		Each
Straight
0.305"-32	Zinc-Plated Steel	7/16"-20	Stainless Steel	37°	1/4"	__	5,000	-20° to 250°	__	SAE AS4395	000000	000000
70° Elbow
0.305"-32	__	7/16"-20	__	37°	1/4"	Brass	5,000	Not Rated	__	__	000000	00000
90° Elbow with a Shut-Off Valve
0.305"-32	__	3/8"-24	__	37°	3/16"	Brass	3,000	-40° to 160°	Core Depressor Pin	SAE AS4395	000000	00000

Air Chucks

Attach these chucks to your air hose so you can connect the hose to Schrader valves. Most often recognized from car and bike tires, Schrader valves are also commonly found on compressed air tanks and high-pressure hydraulic systems.

Chucks with a clip-on Schrader connection attach to the valve stem, so you don’t need to hold them as the valve fills.

Chucks with a sleeve-lock Schrader connection grab onto the valve by sliding the sleeve forward onto the valve. To disconnect, slide the sleeve back and pull out the valve.

Chucks with a threaded Schrader connection screw onto valves for a secure connection that you don’t need to hold in place.

Press-and-Hold Schrader Connection

	Inlet			Outlet
	For Thread Size	For Thread Type	Gender	Connection Style	Connection Type	Barbed Connection Type	Pipe Size	Thread Type	For Tube ID	Gender	Max. Pressure, psi	Material		Each
A	0.305"-32	Schrader	Female	Threaded	Pipe	__	1/4	NPT	__	Female	150	Metal	0000000	00000
B	0.305"-32	Schrader	Female	Threaded	Pipe	__	1/4	NPT	__	Female	150	Metal	0000000	00000
C	0.305"-32	Schrader	Female	Threaded	Pipe	__	1/4	NPT	__	Female	150	Metal	0000000	00000
D	0.305"-32	Schrader	Female	Barbed	Tube	Barbed	__	__	1/4"	Male	150	Metal	0000000	0000
D	0.305"-32	Schrader	Female	Barbed	Tube	Barbed	__	__	3/8"	Male	150	Metal	0000000	0000

Clip-On Schrader Connection

	Inlet			Outlet
	For Thread Size	For Thread Type	Gender	Connection Style	Connection Type	Barbed Connection Type	Pipe Size	Thread Type	For Tube ID	Gender	Max. Pressure, psi	Material		Each
E	0.305"-32	Schrader	Female	Threaded	Pipe	__	1/4	NPT	__	Female	150	Metal	0000000	000000
F	0.305"-32	Schrader	Female	Barbed	Tube	Barbed	__	__	1/4"	Male	150	Metal	0000000	00000

Sleeve-Lock Schrader Connection

	Inlet			Outlet
	For Thread Size	For Thread Type	Gender	Connection Style	Connection Type	Pipe Size	Thread Type	Gender	Max. Pressure, psi	Material		Each
G	0.305"-32	Schrader	Female	Threaded	Pipe	1/4	NPT	Female	120	Metal	000000	000000

Threaded Schrader Connection

	Inlet			Outlet
	Thread Size	Thread Type	Gender	Connection Style	Connection Type	Barbed Connection Type	For Tube ID	Gender	Max. Pressure, psi	Material		Each
H	0.305"-32	Schrader	Female	Barbed	Tube	Barbed	7/32"	Male	120	Metal	000000	00000