The Bearing,roller,tapered, cataloged under National Stock Number 3110-01-280-6883, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-280-6883 |
| Primary Part Number | 55187C AND 55437 |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Cup Width | 0.8125 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE, DOUBLE CUP, SINGLE CONES, STEEP ANGLE |
| Overall Outside Diameter | 4.3750 INCHES NOMINAL IN |
| Backface Corner Radius | 0.1300 INCHES NOMINAL IN |
| Cone Corner Radius | 0.1400 INCHES NOMINAL IN |
| Standout Width | 0.1830 INCHES NOMINAL IN |
| Cone Width | 1.0594 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 1.8750 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 |
|---|---|
| 55187C AND 55437 PRIMARY | The Timken Corporation (USA) |
| Reference | Meaning |
|---|---|
| 5025159-01 | 5/2 Secondary reference U.S. Government activity |
NSN 3110-01-280-6883 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-280-6883 has 1 manufacturer part number on file: 55187C AND 55437 (The Timken Corporation).
Key specifications for 55187C AND 55437: Retainer Fabrication Method: PRESSED; Cup Width: 0.8125 INCHES NOMINAL IN; Style Designator: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES, STEEP ANGLE; Overall Width: 1.1875 INCHES NOMINAL IN. 11 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.