3/8 in. x 1/4 in. Composite DOT Reducing Union
Overview
The 620604A is a 3/8 in. push-to-connect x 1/4 in. push-to-connect DOT reducing union in brass, stepping a 3/8 in. nylon air-brake line down to 1/4 in. tubing tool-free. It is DOT FMVSS-571.106 / SAE J1131 approved for commercial vehicle air brake systems and rated to 200 psi from -40°F to 200°F.
Technical Specifications
| MPN | 620604A |
| Fitting Type | Reducing Union |
| Connection 1 | 3/8 in. Push-to-Connect |
| Connection 2 | 1/4 in. Push-to-Connect |
| Pressure Rating | 200 psi |
| Temperature Range | -40°F to 200°F |
| Standard | DOT FMVSS-571.106 / SAE J1131 |
Materials of Construction
| Body | Brass |
| Collet / Seal | Composite collet, O-ring seal |
Typical Applications
Transitions a 3/8 in. nylon air brake supply line to a 1/4 in. branch or component on trucks, trailers, and buses, providing a tool-free, reusable DOT-approved size reduction without adapters.
Cross-Reference and Interchange
This 3/8 in. x 1/4 in. DOT reducing union cross-references to this competitor and industry part number: 262PPDOT-64-Y. Replacing one of these? Match nominal size, connections, and rating, or send us your part number and we will confirm the interchange.
Sizing and Installation Resources
- Push-to-Connect Fittings Selection Guide
- Pipe Size Reference Chart
- NPT Thread Tightening: Turns Past Hand-Tight
FAQ
What sizes does it join?
3/8 in. OD nylon tube on one end and 1/4 in. OD nylon tube on the other.
Is it DOT approved?
Yes, it meets DOT FMVSS-571.106 and SAE J1131.
What is the pressure rating?
200 psi, higher than the equal-size unions in this series.
WARNING: This product can expose you to chemicals including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.