1/4 in. x 1/8 in. Push-In x Male NPT DOT Elbow, Composite
1/4 in. x 1/8 in. Push-In x Male NPT DOT Elbow, Composite
Sizes in This Series
Composite 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 1/8 in. (this page) | 690402SC | $5.99 | — |
| 3/8 in. x 3/8 in. | 690606SC | $11.99 | Add to cart |
| 5/8 in. x 1/2 in. | 691008SC | $19.99 | Add to cart |
Overview
The Midland 690402SC is a composite-body D.O.T. swivel elbow joining 1/4 in. push-in air brake tubing to a 1/8 in. male NPT port at 90 degrees. The positional swivel lets you aim the tube leg after threading, and the glass-reinforced body resists UV and vibration while weighing less than brass. Meets D.O.T. and SAE air brake standards.
Technical Specifications
| Manufacturer Part # | 690402SC |
| Tube Size (Push-In) | 1/4 in. |
| Thread Size | 1/8 in. Male NPT (1/8 - 27) |
| Connection Type | Push-to-Connect x Male NPT, Swivel 90° Elbow |
| Pressure Rating | 145 psi |
| Temperature Rating | -40°F to 140°F |
| DOT / SAE | FMVSS 571.106, SAE J1131 |
Materials of Construction
| Body | Glass-reinforced composite |
| Collet / Grip Ring | Stainless steel gripper with O-ring seal |
Typical Applications
Routes 1/4 in. DOT air brake tubing around corners on truck and trailer air systems where a lighter, corrosion-proof elbow is preferred over brass. The swivel simplifies aiming the run at fixed-orientation ports on valves and reservoirs.
Cross-Reference and Interchange
This composite DOT swivel elbow cross-references to these competitor and industry part numbers: 269PPSCDOT-4A, 369PTC-4-2, KV2L07-34S, QL1369-4A. 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 the composite elbow DOT rated?
Yes. It meets FMVSS 571.106 and SAE J1131 for air brake service, rated to 145 psi.
What does the swivel do?
It lets the tube leg rotate after you tighten the threads so you can aim the run cleanly.
What tubing does it accept?
1/4 in. OD DOT-rated nylon air brake tubing, cut square and pushed fully in.
What is the temperature limit?
-40°F to 140°F, lower than the brass version, so keep it away from high-heat zones.
WARNING: This product can expose you to chemicals 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.