The Bearing,roller,tapered, cataloged under National Stock Number 3110-00-830-1682, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-830-1682 |
| Primary Part Number | 78250-78537 |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Cup Width | 0.9260 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE, STEEP ANGLE |
| Overall Outside Diameter | 5.3750 INCHES NOMINAL IN |
| Backface Corner Radius | 0.1250 INCHES NOMINAL IN |
| Cone Corner Radius | 0.0930 INCHES NOMINAL IN |
| Standout Width | 0.5115 INCHES NOMINAL IN |
| Cone Width | 1.3085 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 2.5000 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 |
|---|---|
| 78250-78537 PRIMARY | The Timken Corporation (USA) |
| Reference | Meaning |
|---|---|
| WS9030PCS26-27 | 5/9 Secondary reference Carroll Engineering Co |
| WS9030-26-27 | 5/9 Secondary reference Carroll Engineering Co |
NSN 3110-00-830-1682 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-830-1682 has 1 manufacturer part number on file: 78250-78537 (The Timken Corporation).
Key specifications for 78250-78537: Retainer Fabrication Method: PRESSED; Cup Width: 0.9260 INCHES NOMINAL IN; Style Designator: STRAIGHT BORE, STEEP ANGLE; Overall Width: 1.4375 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.