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.
- 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.
- 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.
- 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.
- 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.
- 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 |
Cam-and-Groove Hose Couplings for Abrasive Material
Made of ductile iron, these couplings are tough enough to handle sand, cement, and other abrasive solids and slurries. They resist impact and wear better than aluminum and brass couplings. Use their cam-and-groove fittings to quickly connect and disconnect medium- to large-diameter hose lines. To connect, insert the plug into the socket and press the levers down. The levers fit snugly into the groove on the plug’s body and force the plug against the gasket, forming a tight seal. To disconnect, lift both levers and pull out the plug. A complete coupling consists of a plug and a socket (both sold separately).
Plugs with barbed end are also known as E adapters. Insert the barbed end into plastic or rubber hose and secure with a clamp.
Sockets with barbed end are also known as C couplers. Insert the barbed end into plastic or rubber hose and secure with a clamp.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: Relieve all pressure before disconnecting the couplings. Do not use cam-and-groove couplings with compressed air or gas.
- Maximum Pressure: See table
- Temperature Range: -20° to 250° F
- Attachment Type: Use Band-and-Buckle Clamps
- Specifications Met: Fed. Spec. A-A-59326
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, PT Coupling Cam-and-Groove
- Maximum Pressure: See table
- Temperature Range: -20° to 250° F
- Attachment Type: Use Band-and-Buckle Clamps
- Specifications Met: Fed. Spec. A-A-59326
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, PT Coupling Cam-and-Groove
Sockets | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Levers | Replacement Gaskets | Replacement Levers | Protective Plugs | ||||||||||||
| Coupling Size | Socket ID | For Hose ID | No. of | Material | Pull Ring Material | Max. Pressure | Each | Pkg. Qty. | Pkg. | Each | Each | ||||
Ductile Iron | |||||||||||||||
| 1 | 1 7/16" | 1" | 2 | 300 Series Stainless Steel | 300 Series Stainless Steel | 250 psi @ 72° F | 0000000 | 000000 | 10 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 00 |
| 1 1/2 | 2 1/8" | 1 1/2" | 2 | 300 Series Stainless Steel | 300 Series Stainless Steel | 250 psi @ 72° F | 0000000 | 00000 | 10 | 0000000 | 0000 | 0000000 | 0000 | 000000 | 00 |
| 2 | 2 1/2" | 2" | 2 | 300 Series Stainless Steel | 300 Series Stainless Steel | 250 psi @ 72° F | 0000000 | 00000 | 10 | 0000000 | 0000 | 0000000 | 0000 | 00000000 | 000000 |
| 3 | 3 5/8" | 3" | 2 | 300 Series Stainless Steel | 300 Series Stainless Steel | 200 psi @ 72° F | 0000000 | 00000 | 10 | 0000000 | 00000 | 0000000 | 0000 | 00000000 | 00000 |
| 4 | 4 3/4" | 4" | 2 | 300 Series Stainless Steel | 300 Series Stainless Steel | 150 psi @ 72° F | 0000000 | 000000 | 10 | 0000000 | 00000 | 0000000 | 0000 | 00000000 | 00000 |