The Bearing,ball,annular, cataloged under National Stock Number 3110-01-451-1989, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-01-451-1989 |
| Primary Part Number | 8909A390-001 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Outer Ring Width | 1.1300 INCHES NOMINAL IN |
| Style Designator | COUNTERBORED OUTER RING, NON-SEPARABLE |
| Overall Outside Diameter | 4.0000 INCHES NOMINAL IN |
| Bore Diameter | 1.3780 INCHES NOMINAL IN |
| 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 |
|---|---|
| 8909A390-001 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| MG307FFZ | 5/9 Secondary reference Federal-Mogul Corp Government Sales Dept |
| MG307FFZ | 5/9 Secondary reference Ntn Bearing Corporation of America |
NSN 3110-01-451-1989 is a Bearing,ball,annular, manufactured by The Entwistle Company Llc, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-451-1989 has 1 manufacturer part number on file: 8909A390-001 (The Entwistle Company Llc).
Key specifications for 8909A390-001: Outer Ring Width: 1.1300 INCHES NOMINAL IN; Style Designator: COUNTERBORED OUTER RING, NON-SEPARABLE; Overall Outside Diameter: 4.0000 INCHES NOMINAL IN; Bore Diameter: 1.3780 INCHES NOMINAL IN. 4 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.