The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-319-4872, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Timken Co Div the Timken Company. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-01-319-4872 |
| Primary Part Number | 820-4551451H07 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Timken Co Div the Timken Company |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Surface Finish | GROUND |
| Style Designator | UNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE |
| Overall Outside Diameter | 2.9998 INCHES MINIMUM AND 3.0002 INCHES MAXIMUM IN |
| Contact Angle | 60.0 DEGREES NOMINAL |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO.7 |
| Bore Diameter | 1.7508 INCHES MINIMUM AND 1.7512 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 |
|---|---|
| 820-4551451H07 PRIMARY | Timken Co Div the Timken Company (USA) |
| 820-4551451H07 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| MM9311WI-3HDU | 5/1 Secondary reference Timken Co Div the Timken Company |
| MM9311WI3HDUHFS381A | 5/1 Secondary reference Timken Co Div the Timken Company |
| MM9311WI3HDUFS381A | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3110-01-319-4872 is a Bearing,ball,duplex, manufactured by Timken Co Div the Timken Company, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-319-4872 has 2 manufacturer part numbers on file: 820-4551451H07 (Timken Co Div the Timken Company), 820-4551451H07 (Naval Sea Systems Command).
Key specifications for 820-4551451H07: Retainer Fabrication Method: PRESSED; Surface Finish: GROUND; Style Designator: UNIVERSAL GROUND FACES, COUNTERBORED OUTER RING, NON-SEPARABLE; Overall Width: 1.2500 INCHES NOMINAL IN. 9 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.