1/4 in. x 3/8 in. Push-In x Male NPT DOT Elbow
1/4 in. x 3/8 in. Push-In x Male NPT DOT Elbow
Sizes in This Series
Brass DOT push-in to male NPT elbows. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 in. x 3/8 in. (this page) | 690406 | $10.99 | — |
| 3/8 in. x 1/2 in. | 690608 | $15.99 | Add to cart |
Overview
The Midland 690406 is a forged brass D.O.T. elbow that joins 1/4 in. push-in air brake tubing to a 3/8 in. male NPT port at 90 degrees. The push-in collet seats the tube in one motion and holds it against vibration and pressure cycling, turning the run cleanly at fixed ports. Built to FMVSS 571.106 and SAE J1131.
Technical Specifications
| Manufacturer Part # | 690406 |
| Tube Size (Push-In) | 1/4 in. |
| Thread Size | 3/8 in. Male NPT (3/8 - 18) |
| Connection Type | Push-to-Connect x Male NPT, 90° Elbow |
| Pressure Rating | 150 psi |
| Temperature Rating | -40°F to 200°F |
| DOT / SAE | FMVSS 571.106, SAE J1131 |
Materials of Construction
| Body | Brass |
| Collet / Grip Ring | Stainless steel gripper with O-ring seal |
Typical Applications
Turns 1/4 in. DOT air brake tubing at 90 degrees into a larger 3/8 in. NPT port on truck and trailer valves, reservoirs, and manifolds. Suited to runs that must change direction immediately at the port without a separate elbow and nipple.
Cross-Reference and Interchange
This DOT elbow cross-references to these competitor and industry part numbers: 1569-4-6, 169PMTNS-4-6, 269PC-4x6, 269PPDOT-4C, 69PMTNS-4-6, AQ69-DOT-4X6, D7069DT-4C, NP69-4-6, PC1469-4C, PL-1315-4C, PP69CE-DOT, S269PMTNS-4-6. 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
- NPT Thread Tightening: Turns Past Hand-Tight
- Pipe Size Reference Chart
- Teflon Tape vs. Pipe Dope
Frequently Asked Questions
Is this elbow DOT approved?
Yes. It meets FMVSS 571.106 and SAE J1131, rated to 150 psi.
What tubing does it accept?
1/4 in. OD DOT-rated nylon air brake tubing, cut square and pushed fully in until it bottoms.
Does it need thread sealant?
A thin band of PTFE tape or pipe dope on the 3/8 in. male NPT threads is recommended.
Can the connection be reused?
Yes. Push the collet in and pull the tube out to release, then reconnect.
WARNING: This product can expose you to chemicals including lead, which is 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.