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.
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Twist-Claw Hose Couplings for Air and Water
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.
Iron couplings are stronger and more durable than other metal couplings. Use in noncorrosive 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.
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
- 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
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.
- 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
Large Twist-Claw Hose Couplings for Air and Water
Also known as Chicago and universal couplings, these have identical claw-style heads and connect by being pushed together with a quarter twist. Couplings include a safety clip and lanyard to prevent accidental disconnection. They are made of iron, which is strong and durable. Use in noncorrosive 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.
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
Extra-Large Twist-Claw Hose Couplings for Air and Water
Also known as Chicago and 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 and lanyard to prevent accidental disconnection. They are made of iron, which is strong and durable. Use in noncorrosive 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.
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
- Maximum Pressure: 150 psi @ 72° F
- Maximum Vacuum: Not Rated
- Temperature Range: -20° to 160° F
- Compatible With: Dixon Air King Couplings
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.
For technical drawings and 3-D models, click on a part number.
- 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
- 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" | 1 1/16" to 1 3/16" | 1/2 | NPT | Zinc-Plated Iron | Zinc-Plated Iron | Zinc-Plated Steel | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
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 |