Chicago Hose Fittings | McMaster-Carr

	Pipe Size Pipe Size

	Thread Type Thread Type

NPT

BSPT

BSPP

Chicago Fire Department

	Connection Style Connection Style

Claw

Threaded

Barbed

	Gender Gender


Male	Female

	Material Material

	Finish Finish

Zinc Plated

Painted

	Connection Type Connection Type


Hose	Pipe

	For Use With For Use With

Water

Air

	Type Type


Adapter	Cap

Connector	Plug

	Shape Shape

	Straight
	Cap/Plug
	Wye

	Gasket Material Gasket Material

SBR Rubber

Natural Rubber

Buna-N Rubber

	Length Length

	Maximum Pressure Maximum Pressure

100 psi @ 72° F

150 psi @ 72° F

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

DFARS Specialty Metals
COTS-Exempt

	Maximum Vacuum Maximum Vacuum

29 in. of Hg @ 72° F

Not Rated

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

RoHS Compliant

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

REACH Compliant

	For Hose ID For Hose ID

77 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.

About Fire-Fighting Hose Threads

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. Brass couplings are softer than other metal couplings, so they’re easier to thread together. They have good corrosion resistance. 316 stainless steel couplings have excellent corrosion resistance. They’re the best choice for high-humidity environments.

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, 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
Brass
1/4	Safety Clip with Lanyard	0000000	00000
3/8	Safety Clip with Lanyard	0000000	00000
1/2	Safety Clip with Lanyard	0000000	00000
3/4	Safety Clip with Lanyard	0000000	00000
1	Safety Clip with Lanyard	0000000	00000
316 Stainless Steel
3/8	Safety Clip with Lanyard	0000000	00000
1/2	Safety Clip with Lanyard	0000000	00000
3/4	Safety Clip with Lanyard	0000000	00000
1	Safety Clip with Lanyard	0000000	00000

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	000000
3/4	Safety Clip with Lanyard	00000000	00000
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
316 Stainless Steel
1/2	Safety Clip with Lanyard	00000000	00000
3/4	Safety Clip with Lanyard	00000000	00000
1	Safety Clip with Lanyard	00000000	00000

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
Brass
1/4	Safety Clip with Lanyard	0000000	00000
3/8	Safety Clip with Lanyard	0000000	00000
1/2	Safety Clip with Lanyard	0000000	00000
3/4	Safety Clip with Lanyard	0000000	00000
1	Safety Clip with Lanyard	0000000	00000
316 Stainless Steel
3/8	Safety Clip with Lanyard	0000000	00000
1/2	Safety Clip with Lanyard	0000000	00000
3/4	Safety Clip with Lanyard	0000000	00000
1	Safety Clip with Lanyard	0000000	00000

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	000000
3/4	Safety Clip with Lanyard	00000000	00000
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
316 Stainless Steel
1/2	Safety Clip with Lanyard	00000000	00000
3/4	Safety Clip with Lanyard	00000000	00000
1	Safety Clip with Lanyard	00000000	00000

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	00000
Brass
3/8"	Safety Clip with Lanyard	0000000	00000
1/2"	Safety Clip with Lanyard	0000000	00000
3/4"	Safety Clip with Lanyard	0000000	00000
1"	Safety Clip with Lanyard	0000000	00000
316 Stainless Steel
3/8"	Safety Clip with Lanyard	0000000	00000
1/2"	Safety Clip with Lanyard	0000000	00000
3/4"	Safety Clip with Lanyard	0000000	00000
1"	Safety Clip with Lanyard	0000000	00000

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	000000

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 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		Each
1/2	NPT	00000000	000000
3/4	NPT	00000000	00000
1	NPT	00000000	00000

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		Each
1/2	NPT	00000000	000000
3/4	NPT	00000000	00000

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		Each
1/2"	00000000	000000
3/4"	00000000	00000
1"	00000000	00000

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

Large Twist-Claw Hose Couplings for Air and Water

Also known as universal couplings, these have identical claw-style heads and connect by being pushed 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 1/2	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
1 1/2	NPT	Black	Safety Clip	0000000	000000

Replacement Gasket

0000000

Each

000000

Rocker-Lug Fire Hydrant Caps and Plugs

Plug

The rocker lugs on these caps and plugs allow for easy gripping, so you can quickly close off fire hydrants and washdown equipment. Tighten with a hook-style spanner wrench (sold separately). Caps and plugs are brass for good corrosion resistance.

Chicago Fire Department threads are only compatible with other Chicago Fire Department threads.

Plug
Fire Hose Trade Size	Thread Type	Material	Lg.	Chain Lg.		Each
2 1/2	Chicago Fire Department	Brass	2 3/32"	9"	0000000	000000