Upgrade your trailer or heavy‑duty truck suspension with the Automann MHT2129 Air Spring Plate. Engineered to meet and exceed OEM standards, this robust mounting plate delivers reliable performance for Hendrickson Y‑Beam series applications.
Precision Construction: 12″ (305 mm) outer diameter, 0.187″ (4.75 mm) thickness plate — ideal for HY250YS, HT250YB, and HT250U‑Y air spring systems
Durable Material: Fabricated from high-grade steel to withstand heavy loads and environmental exposure
Direct OEM Fitment: Accurate bolt pattern ensures seamless replacement, maintaining factory suspension geometry
| OEM / Brand | Equivalent Part Number |
|---|---|
| Automann | MHT2129 |
| Hendrickson (Y‑Beam) | B21209, S21209 |
| Dayton | 338‑2162 |
| Hendrickson-Turner | Same as above |
This plate is a direct OEM-fit for HY250YS, HT250YB, HT250U‑Y Y‑Beam air spring systems
Used in air suspension setups on heavy-duty trailers and trucks—restores OEM ride quality and spring alignment.
Outside Diameter (OD): 12 in / 305 mm
Thickness: 0.187 in / 4.75 mm
UPC / MPN: 889626101694 / MHT2129
✅ OEM‑compatible fit for seamless, tool‑free replacement
✅ Built tough with thick steel to resist deformation under load
✅ Cross-branded versatility reduces downtime—keep a Dayton or Hendrickson equivalent on hand
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