The Bearing,roller,tapered, cataloged under National Stock Number 3110-00-293-8958, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-293-8958 |
| Primary Part Number | B27540 |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Lubrication Material | GREASE |
| Cup Width | 4.9790 INCHES MINIMUM AND 5.0050 INCHES MAXIMUM IN |
| Style Designator | STRAIGHT BORE, DOUBLE CUP, SINGLE CONES |
| Overall Outside Diameter | 11.0000 INCHES MINIMUM AND 11.0010 INCHES MAXIMUM IN |
| Backface Corner Radius | 0.0620 INCHES MINIMUM AND 0.0780 INCHES MAXIMUM IN |
| Cone Corner Radius | 0.2500 INCHES MINIMUM AND 0.2660 INCHES MAXIMUM IN |
| Standout Width | 1.1250 INCHES NOMINAL IN |
| Cone Width | 3.6285 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 4.5000 INCHES MINIMUM AND 4.5010 INCHES MAXIMUM 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 |
|---|---|
| B27540 PRIMARY | The Timken Corporation (USA) |
| 327540 | The Timken Corporation (USA) |
| Reference | Meaning |
|---|---|
| 327540 | 5/2 Secondary reference U.S. Government activity |
| 2243721 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| HU45674-1PC57 | 5/2 Secondary reference U.S. Government activity |
NSN 3110-00-293-8958 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-293-8958 has 2 manufacturer part numbers on file: B27540 (The Timken Corporation), 327540 (The Timken Corporation).
Key specifications for B27540: Lubrication Material: GREASE; Cup Width: 4.9790 INCHES MINIMUM AND 5.0050 INCHES MAXIMUM IN; Style Designator: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES; Overall Width: 7.2570 INCHES MINIMUM AND 7.2750 INCHES MAXIMUM 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.