The AD58203 is an aircraft bearing with bore 25.4mm, outer diameter 54.102mm, and width 31.75mm.
Original RBC catalog dimensions: 1.00 × 2.13 × 1.25 in. Metric values are converted using 25.4 mm/in.

| Bearing type | Aircraft Bearings |
| Series | Radials |
| Seal type | Open |
| Material | Confirmed per inquiry — grade and certificate availability reviewed before quotation |
| Bore type | Confirmed per drawing |
| Original catalog dimensions | 1.00 × 2.13 × 1.25 in |
| Dimension unit | millimeter (mm) display; RBC source in inch |
| Bore diameter (d) | 25.4 |
| Outer diameter (D) | 54.102 |
| Width (B) | 31.75 |
Corner radius, shoulder dimensions, fits and tolerances are confirmed against the requested suffix and application drawing before quotation.
Drawings and 3D models are provided per inquiry. Tell us your application and we will send the appropriate file format (DXF, DWG, STEP, IGES).
The models below share the 25.4x54.102x31.75 mm boundary dimensions. Matching d/D/B alone does not prove interchangeability; verify seals, clearance, ring features, load ratings, fits, and application conditions before replacement.
No other catalog models share the same boundary dimensions.
NLHB supports both in-house manufacturing and qualified partner sourcing. We confirm the specification, supply route, inspection requirements, and available documentation before quotation.
About NLHB →Send us your quantity, application and target lead time. We confirm spec, interchange and realistic delivery — no order confirmed until you approve.
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