1/4 in. x 3/8 in. Plastic Composite DOT 45 Male Elbow
Sizes in This Series
Composite DOT 45-degree male elbows, push-to-connect x male NPT. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 in. x 3/8 in. (this page) | 540406SC | $9.99 | — |
| 3/8 in. x 1/2 in. | 540608SC | $17.99 | Add to cart |
| 1/2 in. x 1/4 in. | 540804SC | $22.99 | Add to cart |
Overview
The 540406SC is a 1/4 in. push-to-connect x 3/8 in. male NPT DOT 45-degree elbow molded in lightweight composite, connecting 1/4 in. nylon air-brake tubing to a 3/8-18 NPT port. Built for DOT FMVSS-571.106 air brake systems, the corrosion-free composite body is rated to 145 psi from -40°F to 140°F.
Technical Specifications
| MPN | 540406SC |
| Fitting Type | 45-deg Male Elbow |
| Connection 1 | 1/4 in. Push-to-Connect |
| Connection 2 | 3/8 in. Male NPT (3/8-18) |
| Pressure Rating | 145 psi |
| Temperature Range | -40°F to 140°F |
| Standard | DOT FMVSS-571.106 / SAE |
Materials of Construction
| Body | Composite (glass-reinforced polymer) |
| Collet / Seal | Composite collet, O-ring seal |
Typical Applications
Connects 1/4 in. nylon air brake tubing to a 3/8 in. NPT port at 45 degrees where a corrosion-free, lighter-weight composite fitting is preferred over brass, such as exposed trailer and chassis air lines.
Cross-Reference and Interchange
This 1/4 in. composite DOT 45 male elbow cross-references to these competitor and industry part numbers: 279PPSCDOT-4C, KV2K07-36S. 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
- Teflon Tape vs. Pipe Dope
- Pipe Size Reference Chart
FAQ
Why composite instead of brass?
Composite resists corrosion and road salt and weighs less, while meeting the same DOT air brake standard at a slightly lower temperature ceiling.
Is it DOT approved?
Yes, for DOT FMVSS-571.106 air brake systems.
What is the male thread?
3/8-18 NPT.
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.