The Cup,tapered Roller Bearing, cataloged under National Stock Number 3110-01-253-0101, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is The Timken Corporation. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-253-0101 |
| Primary Part Number | 28520 |
| Item Name | Cup,tapered Roller Bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Style Designator | NORMAL ANGLE |
| Outside Diameter | 3.5425 INCHES NOMINAL IN |
| Backface Corner Radius | 0.0900 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 28520 PRIMARY | The Timken Corporation (USA) |
NSN 3110-01-253-0101 is a Cup,tapered Roller Bearing, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-253-0101 has 1 manufacturer part number on file: 28520 (The Timken Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-631-9293, 4030-01-645-6951. Verify interchangeability with system specifications before substitution.
Key specifications for 28520: Style Designator: NORMAL ANGLE; Overall Width: 0.7869 INCHES NOMINAL IN; Outside Diameter: 3.5425 INCHES NOMINAL IN; Backface Corner Radius: 0.0900 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.