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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High-Pressure Nipples for Compressed Gas
Commonly used in high-pressure welding applications, these nipples connect your tank to the inlet of a pressure regulator. One side has a threaded pipe end and the other side has a rounded end that sits inside a threaded nut (sold separately) so you can make a threaded connection.
Brass nipples have good corrosion resistance and are softer than 316 stainless steel nipples, so they're easier to thread together. Chrome-plated brass nipples have better corrosion and wear resistance than unplated brass nipples and have a bright, shiny appearance.
Nipples that tighten by hand should be paired with a nut with a plastic grip.
- Maximum Pressure: See table
- Maximum Temperature: 120° F
Regulator Connection | ||||||
|---|---|---|---|---|---|---|
| For Number (Max. Pressure) | Pipe Size  | Thread Type | Lg. | For Use With | Each | |
Brass—Tighten With Wrench | ||||||
| CGA 660 (3,000 psi @ 72° F) | 1/4 | NPT | 1 3/4" | Refrigerant Gases | 000000000 | 000000 |
Brass—Tighten By Hand | ||||||
| CGA 660 (3,000 psi @ 72° F) | 1/4 | NPT | 1 3/4" | Refrigerant Gases | 0000000 | 00000 |
Chrome-Plated Brass—Tighten With Wrench | ||||||
| CGA 660 (3,000 psi @ 72° F) | 1/4 | NPT | 1 3/4" | Refrigerant Gases | 0000000 | 00000 |
- Maximum Pressure: See table
- Maximum Temperature: 120° F
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.
Straight adapter kits include everything you need to connect one end to aluminum tubing. Braze the fitting to your tube with one of the braze rings. To prevent leaks, slip an O-ring on after the brazed joint cools. To connect these fittings to a hose, you’ll need a cage, clamps, and hose clamp pliers.
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 | 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 |
| 13/32" | 08 | 06 | 5/8"-18 | 0.52" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 00000 |
| 13/32" | 08 | 08 | 3/4"-16 | 0.64" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 00000 |
| 1/2" | 10 | 08 | 3/4"-16 | 0.64" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 00000 |
| 1/2" | 10 | 10 | 7/8"-14 | 0.77" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 00000 |
| 5/8" | 12 | 10 | 7/8"-14 | 0.77" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 00000 |
| 5/8" | 12 | 12 | 1 1/16"-14 | 0.91" | 0.19" | 2 Clamps, Cage, O-Ring | 0000000 | 00000 |
Dash Size | ||||||
|---|---|---|---|---|---|---|
| For Hose ID | For Hose | Fitting | For Tube OD, mm | Includes | Each | |
Aluminum | ||||||
| 5/16" | 06 | 06 | 10 | 3 Nipple O-Rings, 3 Silver Braze Rings | 0000000 | 000000 |
| 13/32" | 08 | 08 | 12 | 3 Nipple O-Rings, 3 Silver Braze Rings | 0000000 | 00000 |
| 1/2" | 10 | 10 | 16 | 3 Nipple O-Rings, 3 Silver Braze Rings | 0000000 | 00000 |
| 5/8" | 12 | 12 | 18 | 3 Nipple O-Rings, 3 Silver Braze Rings | 0000000 | 00000 |
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 | Dash Size | Wd. | Thick. | Reusable | Includes | Each | |
304 Stainless Steel Clamps with 301 Stainless Steel Cage | |||||||
Single Pinch | |||||||
| 5/16" | 06 | 5/16" | 0.024" | No | 2 Clamps, Cage | 0000000 | 00000 |
| 13/32" | 08 | 5/16" | 0.024" | No | 2 Clamps, Cage | 0000000 | 0000 |
| 1/2" | 10 | 5/16" | 0.024" | No | 2 Clamps, Cage | 0000000 | 0000 |
| 5/8" | 12 | 5/16" | 0.024" | No | 2 Clamps, Cage | 0000000 | 0000 |
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 |