The Bearing,roller,tapered, cataloged under National Stock Number 3110-01-178-8431, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-178-8431 |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Status | ACTIVE |
| Unpackaged Unit Weight | 1.0 POUNDS NOMINAL LBS |
| Cup Width | 1.2500 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE, NORMAL ANGLE |
| Overall Outside Diameter | 4.7500 INCHES NOMINAL IN |
| Backface Corner Radius | 0.0300 INCHES NOMINAL IN |
| Cone Corner Radius | 0.1400 INCHES NOMINAL IN |
| Standout Width | 0.3750 INCHES NOMINAL IN |
| Cone Width | 1.6250 INCHES NOMINAL IN |
| Cubic Measure | 864.000 CUBIC INCHES |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 2.1250 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 |
| Reference | Meaning |
|---|---|
| C-8951-5 | 3/2 Design control — primary reference U.S. Government activity |
| C-8951-5 | 5/9 Secondary reference New England Trawler Equipment Co |
| 621/612 | 5/9 Secondary reference The Timken Corporation |
NSN 3110-01-178-8431 is a Bearing,roller,tapered, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
Key specifications for 3110-01-178-8431: Unpackaged Unit Weight: 1.0 POUNDS NOMINAL LBS; Cup Width: 1.2500 INCHES NOMINAL IN; Style Designator: STRAIGHT BORE, NORMAL ANGLE; Overall Width: 1.6250 INCHES NOMINAL IN. 12 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.