The Bearing,roller,tapered, cataloged under National Stock Number 3110-00-100-4459, 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 10 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-100-4459 |
| Primary Part Number | 2578-2525 |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Cup Width | 0.7500 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE, NORMAL ANGLE |
| Overall Outside Diameter | 2.8355 INCHES NOMINAL IN |
| Backface Corner Radius | 0.0310 INCHES NOMINAL IN |
| Cone Corner Radius | 0.0930 INCHES NOMINAL IN |
| Standout Width | 0.1875 INCHES NOMINAL IN |
| Cone Width | 0.9963 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 1.1250 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 |
|---|---|
| 32J649-86 | Westinghouse Electric Corp (USA) |
| 2578-2525 | Federal-Mogul Corp Government Sales Dept (USA) |
| 2525-2578 | Westinghouse Electric Corp (USA) |
| 32J655PC91 | Westinghouse Electric Corp (USA) |
| 2578-2525 | Rbc Bearings Incorporated Div West Trenton Division (USA) |
| 2525-2578 | The Timken Corporation (USA) |
| 32J614PC82 | Westinghouse Electric Corp (USA) |
| 44J66PC91 | Westinghouse Electric Corp (USA) |
| 2578-2525 PRIMARY | The Timken Corporation (USA) |
| 44J66PC92 | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 2578-2525 | 5/9 Secondary reference Tyson Bearing Co Div Skf Industries Inc |
| FFB187TYPE751 | 4/1 Identification reference U.S. Government activity |
NSN 3110-00-100-4459 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-100-4459 has 10 manufacturer part numbers on file: 32J649-86 (Westinghouse Electric Corp), 2578-2525 (Federal-Mogul Corp Government Sales Dept), 2525-2578 (Westinghouse Electric Corp), 32J655PC91 (Westinghouse Electric Corp), 2578-2525 (Rbc Bearings Incorporated Div West Trenton Division) and 5 more.
Key specifications for 2578-2525: Cup Width: 0.7500 INCHES NOMINAL IN; Style Designator: STRAIGHT BORE, NORMAL ANGLE; Overall Width: 0.9375 INCHES NOMINAL IN; Overall Outside Diameter: 2.8355 INCHES NOMINAL IN. 10 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.