Description
DOT push-in 45° male swivel elbow that connects 1/2″ OD nylon air-brake tubing to a 1/4″ male NPTF port through a 45° bend. The Midland 540804S is constructed of brass with a brass captive eyelet, a 90-durometer Buna-N O-ring, and pre-applied Teflon-based thread sealant; the swivel allows the elbow to be oriented after the male threads are seated. It is rated to 150 PSI and meets D.O.T. FMVSS 571.106 / SAE J1131 air brake requirements.
Specifications
| Manufacturer | Midland Industries |
|---|---|
| Part Number | 540804S |
| Part Type | DOT Push-In 45° Male Swivel Elbow |
| Tube Connection | 1/2″ OD Push-to-Connect |
| Pipe Connection | 1/4″ Male NPTF (swivel) |
| Angle | 45° |
| Body Material | Brass with brass captive eyelet |
| Seal Material | Buna-N / Nitrile (90 durometer) |
| Thread Sealant | Pre-applied Teflon-based |
| Working Pressure | Vacuum to 150 PSI |
| Temperature Range | -40°F to 200°F |
| Approvals | D.O.T. FMVSS 571.106; SAE J1131 |
Applications
This DOT push-in 45° swivel elbow is designed for compressed-air plumbing on Class 5–8 trucks, tractors, and trailers, including:
- DOT air brake supply and control-line connections at valves and reservoirs
- Air suspension supply lines requiring a 45° approach
- Trailer air-line connections and gladhand pigtails
- Auxiliary air systems (air horns, air seats, axle locks) where space requires a 45° offset
For use with DOT-approved 1/2″ OD nylon air-brake tubing. Verify tube outside diameter and pipe thread size before ordering.
