The Bearing,roller,tapered, cataloged under National Stock Number 3110-01-027-3181, 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 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-027-3181 |
| Primary Part Number | 74550-74850Y4S74850ASM90186 |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Overall Outside Diameter | 8.5000 INCHES NOMINAL IN |
| Backface Corner Radius | 0.1300 INCHES NOMINAL IN |
| Cone Corner Radius | 0.1400 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 5.5000 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 |
|---|---|
| 74550-74850Y4S74850ASM90186 PRIMARY | The Timken Corporation (USA) |
| 6L-5437 | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3110-01-027-3181 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-027-3181 has 2 manufacturer part numbers on file: 74550-74850Y4S74850ASM90186 (The Timken Corporation), 6L-5437 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 74550-74850Y4S74850ASM90186: Overall Outside Diameter: 8.5000 INCHES NOMINAL IN; Backface Corner Radius: 0.1300 INCHES NOMINAL IN; Cone Corner Radius: 0.1400 INCHES NOMINAL IN; Special Features: TWO SINGLE CONES,TWO SINGLE CUPS,ONE CUP SPACER Y4S74850,0.0120 IN. BENCH LATERAL IN. 6 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.