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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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Color-Coded Identification Rings for Push-to-Connect Tube Fittings for Air
Color-code your lines by snapping these rings over the release ring on push-to-connect fittings.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Material | Choose a Color | Each | |
| 1/8" | Nylon Plastic | Yellow | 00000000 | 00000 |
| 5/32" | Nylon Plastic | 00000000 | 000 | |
| 3/16" | Nylon Plastic | 00000000 | 000 | |
| 1/4" | Nylon Plastic | 00000000 | 000 | |
| 5/16" | Nylon Plastic | 00000000 | 000 | |
| 3/8" | Nylon Plastic | 00000000 | 000 | |
| 1/2" | Nylon Plastic | Yellow | 00000000 | 000 |
| 6mm | Nylon Plastic | 00000000 | 000 | |
| 10mm | Nylon Plastic | 00000000 | 0000 | |
| 12mm | Nylon Plastic | 00000000 | 0000 |
Color-Coded Identification Rings for Low-Temperature
D.O.T. Push-to-Connect Tube Fittings for Air
Color-code your lines by snapping one of these rings over the release ring on low-temperature D.O.T. push-to-connect tube fittings. Often used in air brake lines for commercial trucks and trailers, they meet Department of Transportation FMVSS 571 safety standards.
For technical drawings and 3-D models, click on a part number.