Iron Hose Fittings | McMaster-Carr

	Connection Style Connection Style

Threaded

Claw

Barbed

	Pipe Size Pipe Size

	Thread Type Thread Type

NPT

BSPP

BSPT

	Connection Type Connection Type


Hose	Pipe

	For Use With For Use With

Air

Water

Steam

	Gender Gender


Male	Female

	Type Type


Adapter	Clamp

Cap	Connector

	Material Material

Iron

Steel

	Shape Shape

	Straight
	Cap/Plug
	Wye

	For Hose ID For Hose ID

3/8"

1/2"

3/4"

	Maximum Pressure Maximum Pressure

100 psi @ 72° F

150 psi @ 72° F

250 psi @ 72° F

	Length Length

	Finish Finish

Zinc Plated

Painted

	Maximum Vacuum Maximum Vacuum

28 in. of Hg @ 72° F

29 in. of Hg @ 72° F

Not Rated

	Compatible With Compatible With

Dixon Air King

Dixon Boss

Dixon Ground Joint

	Maximum Temperature Maximum Temperature

160° F

450° F

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

DFARS Specialty Metals
COTS-Exempt

	Gasket Material Gasket Material

Rubber

Plastic

	Barbed Connection Type Barbed Connection Type

	Interlocking Clamp
	Clamp On

	Attachment Type Attachment Type


Interlocking Clamp	Band-and- Buckle Clamp

	For Maximum Hose OD For Maximum Hose OD

	For Minimum Hose OD For Minimum Hose OD

	Clamp Material Clamp Material

Steel

Iron

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71 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.

Also known as Chicago and universal couplings, these have an identical claw-style head that allows you to connect to another Chicago twist-claw hose coupling, regardless of the pipe size or barbed hose ID. To connect, push two couplings together with a quarter twist. Couplings have a safety clip and lanyard to prevent accidental disconnection.

Couplings with a barbed end insert into rubber hose and secure with a clamp.

Wye couplings are also known as three-way hose couplings. Use them to connect one inlet to two outlets.

Iron couplings are stronger and more durable than other metal couplings. Use in noncorrosive environments. Zinc-plated steel couplings have fair corrosion resistance and should be used primarily in dry environments. Warning: There is no valve in these couplings. Stop the flow of air and water before you disconnect the line.

Straight Adapters, NPT Male Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Pipe Size	Includes		Each
1/4	Safety Clip with Lanyard	0000000	00000
3/8	Safety Clip with Lanyard	0000000	0000
1/2	Safety Clip with Lanyard	0000000	0000
3/4	Safety Clip with Lanyard	0000000	0000
1	Safety Clip with Lanyard	0000000	0000

Replacement Safety Clip with Lanyard	0000000	Each	00000
Replacement Gaskets (10/Pkg.)	0000000	Pkg.	0000

Straight Adapters, BSPT Male Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Pipe Size	Includes		Each
1/2	Safety Clip with Lanyard	00000000	00000
3/4	Safety Clip with Lanyard	00000000	0000
1	Safety Clip with Lanyard	00000000	00000
Zinc-Plated Steel
1/2	Safety Clip with Lanyard	00000000	0000
3/4	Safety Clip with Lanyard	00000000	0000
1	Safety Clip with Lanyard	00000000	0000

Straight Adapters, NPT Female Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Pipe Size	Includes		Each
1/4	Safety Clip with Lanyard	0000000	00000
3/8	Safety Clip with Lanyard	0000000	0000
1/2	Safety Clip with Lanyard	0000000	0000
3/4	Safety Clip with Lanyard	0000000	0000
1	Safety Clip with Lanyard	0000000	0000

Replacement Safety Clip with Lanyard	0000000	Each	00000
Replacement Gaskets (10/Pkg.)	0000000	Pkg.	0000

Straight Adapters, BSPP Female Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Pipe Size	Includes		Each
1/2	Safety Clip with Lanyard	00000000	00000
3/4	Safety Clip with Lanyard	00000000	0000
1	Safety Clip with Lanyard	00000000	00000
Zinc-Plated Steel
1/2	Safety Clip with Lanyard	00000000	0000
3/4	Safety Clip with Lanyard	00000000	0000
1	Safety Clip with Lanyard	00000000	0000

Straight Adapters, Barbed Hose

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Attachment Type: Use Band-and-Buckle Clamps
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
For Hose ID	Includes		Each
3/8"	Safety Clip with Lanyard	0000000	00000
1/2"	Safety Clip with Lanyard	0000000	0000
3/4"	Safety Clip with Lanyard	0000000	0000
1"	Safety Clip with Lanyard	0000000	0000

Replacement Safety Clip with Lanyard	0000000	Each	00000
Replacement Gaskets (10/Pkg.)	0000000	Pkg.	0000

Wye Connectors

Maximum Pressure: 150 psi @ 72° F
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Includes		Each
Safety Clip with Lanyard	0000000	000000

Replacement Safety Clip with Lanyard	0000000	Each	00000
Replacement Gaskets (10/Pkg.)	0000000	Pkg.	0000

Caps

Maximum Pressure: 150 psi @ 72° F
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Includes		Each
Safety Clip with Lanyard	0000000	00000

Replacement Safety Clip with Lanyard	0000000	Each	00000
Replacement Gaskets (10/Pkg.)	0000000	Pkg.	0000

Spring-Lock Twist-Claw Hose Couplings for Air and Water

Prevent accidental disconnection with these couplings—they come with a safety clip and lanyard, and have a spring-loaded locking sleeve that automatically locks into place when you connect the coupling. Also known as Chicago and universal couplings, they have an identical claw-style head that allows you to connect to any other spring-lock twist-claw hose coupling. To connect, push two couplings together with a quarter twist. To disconnect, slide the locking sleeves back and twist the couplings apart. Couplings are iron, which is strong and durable. Use in noncorrosive environments.

Couplings with a barbed end insert into rubber hose and secure with a clamp.

Warning: There is no valve in these couplings. Stop the flow of air and water before you disconnect the line.

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

Straight Adapters, Male Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: 29 in. of Hg @ 72° F
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Iron
Pipe Size	Thread Type	Includes		Each
1/2	NPT	Safety Clip with Lanyard	00000000	000000
3/4	NPT	Safety Clip with Lanyard	00000000	00000
1	NPT	Safety Clip with Lanyard	00000000	00000

Replacement Gaskets (10/Pkg.)	0000000	Pkg.	00000
Replacement Safety Clip with Lanyard	0000000	Each	000

Straight Adapters, Female Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: 29 in. of Hg @ 72° F
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Iron
Pipe Size	Thread Type	Includes		Each
1/2	NPT	Safety Clip with Lanyard	00000000	000000
3/4	NPT	Safety Clip with Lanyard	00000000	00000

Replacement Gaskets (10/Pkg.)	0000000	Pkg.	00000
Replacement Safety Clip with Lanyard	0000000	Each	000

Straight Adapters, Barbed Hose

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: 29 in. of Hg @ 72° F
Temperature Range: -20° to 160° F
Attachment Type: Use Band-and-Buckle Clamps
Compatible With: Dixon Air King Couplings

Iron
For Hose ID	Includes		Each
1/2"	Safety Clip with Lanyard	00000000	000000
3/4"	Safety Clip with Lanyard	00000000	00000
1"	Safety Clip with Lanyard	00000000	00000

Replacement Gaskets (10/Pkg.)	0000000	Pkg.	00000
Replacement Safety Clip with Lanyard	0000000	Each	000

Large Twist-Claw Hose Couplings for Air and Water

Also known as universal couplings, these have an identical claw-style head that allows you to connect to any other large twist-claw hose coupling, regardless of the pipe size. To connect, push two couplings together with a quarter twist. Couplings include a safety clip to prevent accidental disconnection. They are made of iron, which is strong and durable, and have a black painted finish for fair corrosion resistance. Use in noncorrosive environments.

Warning: There is no valve in these couplings. Stop the flow of air and water before you disconnect the line.

Straight Adapters, Male Threaded Pipe

Maximum Pressure: 100 psi @ 72° F
Temperature Range: -20° to 160° F

Painted Iron
Pipe Size	Thread Type	Color	Includes		Each
1 1/4	NPT	Black	Safety Clip	0000000	000000
1 1/2	NPT	Black	Safety Clip	0000000	00000

Replacement Gasket

0000000

Each

000000

Straight Adapters, Female Threaded Pipe

Maximum Pressure: 100 psi @ 72° F
Temperature Range: -20° to 160° F

Painted Iron
Pipe Size	Thread Type	Color	Includes		Each
1 1/4	NPT	Black	Safety Clip	0000000	000000
1 1/2	NPT	Black	Safety Clip	0000000	00000

Replacement Gasket

0000000

Each

000000

Extra-Large Twist-Claw Hose Couplings for Air and Water

Also known as universal couplings, these have an identical claw-style head that allows you to connect to any other extra-large twist-claw hose coupling. To connect, push two couplings together with a quarter twist. Couplings include a safety clip to prevent accidental disconnection. They are made of iron, which is strong and durable, and have a black painted finish for fair corrosion resistance. Use in noncorrosive environments.

Warning: There is no valve in these couplings. Stop the flow of air and water before you disconnect the line.

Straight Adapters, Male Threaded Pipe

Maximum Pressure: 100 psi @ 72° F
Temperature Range: -20° to 160° F

Painted Iron
Pipe Size	Thread Type	Color	Includes		Each
2	NPT	Black	Safety Clip	0000000	000000

Replacement Gasket

0000000

Each

000000

Straight Adapters, Female Threaded Pipe

Maximum Pressure: 100 psi @ 72° F
Temperature Range: -20° to 160° F

Painted Iron
Pipe Size	Thread Type	Color	Includes		Each
2	NPT	Black	Safety Clip	0000000	000000

Replacement Gasket

0000000

Each

000000

Interlocking-Clamp Hose Fittings for Steam

Also known as ground-joint couplings and boss couplings, these fittings are designed for high-pressure steam heating, humidification, and washdown applications. Insert the barbed end of the fitting into rubber hose, then position the interlocking clamp over the hose and bolt into place with a torque wrench. The clamp firmly grips the hose as it locks into the ring of the barbed end, creating a leak tight seal. The interlocking clamps are not reusable. Fittings are strong and durable with fair corrosion resistance.

Fittings with a female threaded end have a hex bushing (also known as a female spud) that connects to a male interlocking-clamp hose fitting. Replace the hex bushing with a hex nipple (sold separately) to connect two female fittings; the hex nipples are also known as double spuds.

Warning: There is no valve in these couplings. Stop the flow of steam before you disconnect the hose line.

Straight Adapters, Barbed × Male Threaded Pipe

Maximum Pressure: 250 psi @ 72° F
Maximum Vacuum: 28 in. of Hg @ 72° F
Temperature Range: -20° to 450° F
Attachment Type: Use Interlocking Clamps (included)
Compatible With: Dixon Boss, Dixon Ground Joint

Adapters							Replacement Interlocking Clamps
For Hose ID	For Hose OD Range	Pipe Size	Thread Type	Clamp Material		Each		Each
Zinc-Plated Steel
1/2"	15/16" to 1 1/16"	1/2	NPT	Zinc-Plated Steel	0000000	000000	0000000	000000
1/2"	1 1/16" to 1 3/16"	1/2	NPT	Zinc-Plated Iron	0000000	00000	0000000	00000
3/4"	1 5/32" to 1 5/16"	3/4	NPT	Zinc-Plated Steel	0000000	00000	0000000	00000
3/4"	1 5/16" to 1 1/2"	3/4	NPT	Zinc-Plated Steel	0000000	00000	0000000	00000
1"	1 11/16" to 1 15/16"	1	NPT	Zinc-Plated Steel	0000000	00000	0000000	00000
Zinc-Plated Iron
2"	2 1/2" to 2 25/32"	2	NPT	Zinc-Plated Iron	0000000	00000	0000000	00000

Straight Adapters, Barbed × Female Threaded Pipe

Maximum Pressure: 250 psi @ 72° F
Maximum Vacuum: 28 in. of Hg @ 72° F
Temperature Range: -20° to 450° F
Attachment Type: Use Interlocking Clamps (included)
Compatible With: Dixon Boss, Dixon Ground Joint

Adapters									Replacement Interlocking Clamps		Replacement Hex Bushings		Hex Nipples
For Hose ID	For Hose OD Range	Pipe Size	Thread Type	Clamp Material	Wing Nut Material	Hex Bushing Material		Each		Each		Each		Each
Zinc-Plated Steel
1/2"	15/16" to 1 1/16"	1/2	NPT	Zinc-Plated Steel	Zinc-Plated Iron	Zinc-Plated Steel	0000000	000000	0000000	000000	0000000	000000	0000000	000000
1/2"	1 1/16" to 1 3/16"	1/2	NPT	Zinc-Plated Iron	Zinc-Plated Iron	Zinc-Plated Steel	0000000	00000	0000000	00000	0000000	00000	0000000	00000
3/4"	1 5/32" to 1 5/16"	3/4	NPT	Zinc-Plated Steel	Zinc-Plated Iron	Zinc-Plated Steel	0000000	00000	0000000	00000	0000000	00000	0000000	00000
3/4"	1 5/16" to 1 1/2"	3/4	NPT	Zinc-Plated Steel	Zinc-Plated Iron	Zinc-Plated Steel	0000000	00000	0000000	00000	0000000	00000	0000000	00000
1"	1 11/16" to 1 15/16"	1	NPT	Zinc-Plated Steel	Zinc-Plated Iron	Zinc-Plated Steel	0000000	00000	0000000	00000	0000000	00000	0000000	00000
Zinc-Plated Iron
2"	2 1/2" to 2 25/32"	2	NPT	Zinc-Plated Iron	Zinc-Plated Iron	Zinc-Plated Iron	0000000	000000	0000000	00000	0000000	00000	0000000	00000

Interlocking Clamps for Hose Fittings for Steam

Maximum Pressure: 250 psi @ 72° F
Maximum Vacuum: 28 in. of Hg @ 72° F
Temperature Range: -20° to 450° F
Compatible With: Dixon Boss, Dixon Ground Joint

Use with interlocking-clamp hose fittings to replace a damaged clamp. They consist of two halves held together by nuts and bolts. Clamps are strong and durable with fair corrosion resistance.

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

Zinc-Plated Steel
For Hose ID	For Hose OD Range	Clamp Material		Each
1/2"	15/16" to 1 1/16"	Zinc-Plated Steel	0000000	000000
3/4"	1 5/32" to 1 5/16"	Zinc-Plated Steel	0000000	00000
3/4"	1 5/16" to 1 1/2"	Zinc-Plated Steel	0000000	00000
1"	1 11/16" to 1 15/16"	Zinc-Plated Steel	0000000	00000
Zinc-Plated Iron
1/2"	1 1/16" to 1 3/16"	Zinc-Plated Iron	0000000	00000
2"	2 1/2" to 2 25/32"	Zinc-Plated Iron	0000000	00000