The Bearing,roller,tapered, cataloged under National Stock Number 3110-00-100-5643, 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 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-100-5643 |
| Primary Part Number | 3780-3720B |
| Item Name | Bearing,roller,tapered |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Timken Corporation |
| Status | ACTIVE |
| Cup Outside Diameter | 3.6718 INCHES NOMINAL IN |
| Flange Outside Diameter | 3.8598 INCHES NOMINAL IN |
| Cup Width | 0.9375 INCHES NOMINAL IN |
| Style Designator | STRAIGHT BORE, FLANGED CUP, NORMAL ANGLE |
| Backface Corner Radius | 0.1250 INCHES NOMINAL IN |
| Cone Corner Radius | 0.1400 INCHES NOMINAL IN |
| Standout Width | 0.4375 INCHES NOMINAL IN |
| Cone Width | 1.1930 INCHES NOMINAL IN |
| Flange Width | 0.1875 INCHES NOMINAL IN |
| Standard Tolerance Designation | AFBMA CLASS 2 |
| Bore Diameter | 2.0000 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 |
|---|---|
| 3780-3720B PRIMARY | The Timken Corporation (USA) |
NSN 3110-00-100-5643 is a Bearing,roller,tapered, manufactured by The Timken Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-100-5643 has 1 manufacturer part number on file: 3780-3720B (The Timken Corporation).
Key specifications for 3780-3720B: Cup Outside Diameter: 3.6718 INCHES NOMINAL IN; Flange Outside Diameter: 3.8598 INCHES NOMINAL IN; Cup Width: 0.9375 INCHES NOMINAL IN; Style Designator: STRAIGHT BORE, FLANGED CUP, NORMAL ANGLE. 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.