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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Metal Barbed Hose Fittings for Air and Water
Slide the barbed end into rubber hose and secure with the appropriate clamp or crimp-on hose ferrule.
Brass fittings are softer than other metal fittings, so they’re easier to thread together. Plain brass fittings have good corrosion resistance. Fittings with a threaded end are also known as hose nipples.
Fittings with a 45° flared end are also known as refrigeration and SAE fittings.
- Maximum Pressure: 250 psi @ 72° F
- Temperature Range: -40° to 160° F
- Attachment Type: Use Crimp-On Hose Ferrules, except For 1/2" Hose ID: Use Band-and-Buckle Clamps
- Specifications Met: SAE J476
Metal Push-On Barbed Hose Fittings for Air and Water
Fittings have sharper barbs than standard barbed hose fittings to grip rubber push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip.
Brass fittings are softer than other metal fittings, so they’re easier to thread together. They have good corrosion resistance.
Fittings with a flared end meet JIC or SAE standards for dimensions. Fittings with a 45° flared end are also known as refrigeration and SAE fittings.The optional installation tool (sold separately) allows you to connect large quantities of barbed fittings to push-on hose. Use the built-in cutter to squarely cut the hose without fraying. Next, lubricate either the push-on hose, fitting or both. Then, clamp the hose into the tool’s vise and apply light pressure on the handle to drive into the fitting.
Note: To ensure proper connection, the barbed end has to be pushed in all the way, with the hose end concealed by the ring.
Mounting Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Hose ID Range | Lg. | Ht. | Dp. | Dia. | No. of | Mounting Fasteners Included | Each | |
| 1/4" to 3/4" | 13 1/2" | 7" | 2 3/8" | 5/8" | 4 | No | 00000000 | 0000000 |
Nuts for High-Pressure Nipples for Compressed Gas
Slide a high-pressure hose nipple for compressed gas into one of these nuts to connect a pipe to the inlet of a pressure regulator. They are also known as CGA (Compressed Gas Association) nuts and inlet nuts.
Brass nuts have good corrosion resistance and are softer than 316 stainless steel nuts, so they're easier to thread together. Aluminum-plated brass nuts have better corrosion and wear resistance than unplated brass.
Note: Nuts have a CGA, BS, or DIN number that corresponds to a specific type of gas. Choose a nut with the same number as your tank and other system components.
- Maximum Pressure: See table
- Maximum Temperature: 120° F, except DIN 477 No. 9: 250° F
Number | Thread Size | Thread Type | Thread Direction | Max. Pressure | For Use With | Each | |
Aluminum-Plated Brass | |||||||
|---|---|---|---|---|---|---|---|
| CGA 180 | 5/8"-18 | UN/UNF (CGA) | Right Hand | 3,000 psi @ 72° F | Air, Argon, Butane, Carbon Dioxide, Helium, Krypton, Methane, Natural Gas, Neon, Nitrogen, Oxygen, Propane, Propylene | 000000000 | 000000 |
Threaded Hose Fittings for Compressed Gas
Use these fittings to connect welding hose to pressure regulators and torches. They are also known as CGA (Compressed Gas Association) fittings. Fittings are brass for good corrosion resistance.
Note: Fittings have a CGA number that corresponds to a specific type of gas. Choose a fitting with the same CGA number as your tank and other system components.
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
| CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | |||||||
|---|---|---|---|---|---|---|---|
| 032 x 022 | B | 5/8"-18 x 9/16"-18 | UN/UNF (CGA) | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Oxygen, Xenon | 0000000 | 000000 |
- Maximum Pressure: 200 psi @ 72° F
- Maximum Temperature: 120° F
Male Hose Connection | Male Pipe Connection | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CGA Number | Gas Fitting Size | Thread Size | Thread Type | Thread Direction | Pipe Size | Thread Type | Thread Direction | For Use With | Each | |
Brass | ||||||||||
| 032 | B | 5/8"-18 | UN/UNF (CGA) | Right Hand | 1/4 | NPT | Right Hand | Argon, Helium, Krypton, Neon, Nitrogen, Xenon | 0000000 | 000000 |
Screw-On Hose Fittings for D.O.T. Hose
Create or repair D.O.T. hose assemblies in the field with just a wrench and a vise, no crimper required. To install, separate the two pieces of these fittings. Screw the hose-end portion onto your hose, then thread the nipple portion into the hose-end portion. When assembled, these fittings compress against the hose to form a strong seal. Also known as reusable fittings, they can be unscrewed from your hose and used on a new one. All meet labeling and performance requirements for motor vehicle brake hose fittings.
Fittings with a flared tube connection swivel 360° until tightened for easy installation.
- Maximum Pressure: See table
- Temperature Range: -40° to 300° F
- Specifications Met: D.O.T. FMVSS 106, SAE J517 100R5
- For Hose Manufacturer Series: Parker 201 SAE J517 100R5
For Hose | ||||||||
|---|---|---|---|---|---|---|---|---|
| ID | OD | For Tube OD | Thread Size | Thread Type | Dash Size | Max. Pressure | Each | |
Zinc-Plated Steel—Parker 20 Series | ||||||||
| 5/16" | 11/16" | 3/8" | 5/8"-18 | UN/UNF (SAE 45°) | 06 | 2,250 psi @ 72° F | 0000000 | 000000 |
Refrigerant Hose Fittings
- Maximum Pressure: 500 psi @ 72° F
- Maximum Vacuum: 28 in. of Hg @ 72° F
- Temperature Range: -40° to 280° F
- Compatible With: Danfoss EZ Clip
- All Fittings Swivel Until Tightened
- Specifications Met: SAE J2064, SAE J3062
- Compatible Hose: Refrigerant Hose
No need for expensive crimping tools—these fittings make air conditioning and refrigeration assemblies with clamps. Instead of a crimper, they use two clamps that you tighten against a cage on your fitting with pliers. Both fitting ends swivel until tightened, so you don't have to rotate the entire hose during installation. The cage and clamps stretch out after use, so they shouldn't be used again.
Fittings with an O-ring pilot create a leak-tight seal, so they’re often used in commercial and vehicle air conditioning systems. When you screw the fitting onto your tube, the bead and the pilot squeeze the O-ring, which fills in any gaps. The pilot also helps guide your hose onto the fitting, making it easy to properly align and secure the connection.
Fittings with a 45° flared end are also known as SAE fittings.
Dash Size | ||||||
|---|---|---|---|---|---|---|
| For Hose ID | For Hose | Fitting | Thread Size | Includes | Each | |
Zinc-Plated Steel | ||||||
| 5/16" | 06 | 06 | 5/8"-18 | 2 Clamps, Cage | 0000000 | 000000 |
Dash Size | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Hose ID | For Hose | Fitting | Thread Size | Bead OD | Pilot Lg. | Includes | Each | |
Zinc-Plated Steel | ||||||||
| 13/32" | 08 | 06 | 5/8"-18 | 0.52" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 000000 |
Dash Size | ||||||
|---|---|---|---|---|---|---|
| For Hose ID | For Hose | Fitting | Thread Size | Includes | Each | |
Zinc-Plated Steel | ||||||
| 5/16" | 06 | 06 | 5/8"-18 | 2 Clamps, Cage | 0000000 | 000000 |
Dash Size | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Hose ID | For Hose | Fitting | Thread Size | Bead OD | Pilot Lg. | Includes | Each | |
Zinc-Plated Steel | ||||||||
| 5/16" | 06 | 06 | 5/8"-18 | 0.52" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 000000 |
Jaw | |||||||
|---|---|---|---|---|---|---|---|
| Overall Lg. | Grip Style | Opening Style | Texture | Material | Tip Type | Each | |
Pinch Clamp Pliers—Straight Jaw | |||||||
| 6 7/8" | Cushion | Spring Assisted | Smooth | Steel | Fixed | 0000000 | 0000000 |
Band | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Hose ID Range | For OD | Dash Size | Wd. | Thick. | Reusable | Number of Pieces | Includes | Each | |
304 Stainless Steel Clamps with 301 Stainless Steel Cages | |||||||||
Single Pinch | |||||||||
| 5/16" to 5/8" | 0.6" to 0.99" | 06, 08, 10, 12 | 5/16" | 0.024" | No | 122 | Cages with 5/16" band width for 5/16" hose ID (10 each) Clamps with 5/16" band width, .32" clamp ID (20 each) Cages with 5/16" band width for 13/32" hose ID (10 each) Clamps with 5/16" band width, .42" clamp ID (20 each) Cages with 5/16" band width for 1/2" hose ID (10 each) Clamps with 5/16" band width, .52" clamp ID (20 each) Cages with 5/16" band width for 5/8" hose ID (10 each) Clamps with 5/16" band width, .62" clamp ID (20 each) Pinch Clamp Pliers Hose Cutter | 0000000 | 0000000 |
45° Flared Fittings for Copper and Brass Tubing
- Temperature Range: -65° to 250° F
- Tubing: Use with seamless brass and copper that meets ASTM B280
No sleeve is required to assemble these fittings, which makes for a faster, more convenient installation compared to 37° flared fittings. They require a nut (sold separately) for each tube end. Fittings are also known as refrigeration and SAE fittings. They are brass for good corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except adapters for 1/8" and 1" tube OD are not for use with fuel oil
- Specifications Met: See table
For Tube | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Pipe Size | Material | Max. Pressure | Specifications Met | 1-9 | 10-49 | 50-Up | |
NPTF Threads | |||||||||
| 3/8" | 0.032" | 1/8 | Brass | 1,000 psi @ 72° F | SAE J512, SAE J513, UL Listed | 000000000 | 00000 | 00000 | 00000 |
| 3/8" | 0.032" | 1/4 | Brass | 1,000 psi @ 72° F | SAE J512, SAE J513, UL Listed | 000000000 | 0000 | 0000 | 0000 |
| 3/8" | 0.032" | 3/8 | Brass | 1,000 psi @ 72° F | SAE J512, SAE J513, UL Listed | 000000000 | 0000 | 0000 | 0000 |
| 3/8" | 0.032" | 1/2 | Brass | 1,000 psi @ 72° F | SAE J512, SAE J513, UL Listed | 000000000 | 0000 | 0000 | 0000 |
| 3/8" | 0.032" | 3/4 | Brass | 1,000 psi @ 72° F | SAE J512, SAE J513, UL Listed | 000000000 | 00000 | 00000 | 00000 |
- For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except nuts for 1" tube OD are not for use with fuel oil
- Specifications Met: SAE J512, SAE J513, UL Listed; except nuts for 1" tube OD meet SAE J512 and SAE J513 only