Description
Genuine Mack/Volvo 20999384 is a DOT-approved 90° PLC swivel male elbow air-brake fitting that joins 1/2 in push-in nylon tubing to an M22 x 1.5 metric O-ring boss. Brass-and-composite construction provides a leak-free, vibration-resistant connection on FMVSS 121 air-brake systems used across the Volvo VNL/VHD and Mack CXU/Granite/Pinnacle platforms, replacing Automann 177.V20999384 in the same role.
Specifications
| Manufacturer | Mack / Volvo |
|---|---|
| Part Number | 20999384 |
| Part Type | 90° PLC Swivel Male Elbow Air Fitting (DOT) |
| Tube Size | 1/2 in push-in |
| Thread Size | M22 x 1.5 metric O-ring |
| Material | Brass / Composite |
| DOT Approval | Yes |
| Application | FMVSS 121 air brake / pneumatic |
Cross References
This 90° elbow fitting replaces or is equivalent to the following part numbers:
- Mack / Volvo: 20999384
- Automann: 177.V20999384
Applications
This DOT 90° air-brake elbow fitting is used on Volvo and Mack air systems requiring a 1/2 in push-in to M22 x 1.5 transition, including:
- Volvo VNL, VNM, VHD (D11, D13, D16)
- Mack CHU, CXU, Granite, Pinnacle, MRU (MP7, MP8, MP10)
- Other Class 8 platforms using Volvo PLC composite air-brake fittings
Verify thread size, tube OD, and DOT requirements on your existing fitting before ordering. Push-in fittings require a clean, square-cut tube end for proper sealing.
