The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-442-6725, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Kaydon Corporation Dba Kaydon Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-442-6725 |
| Primary Part Number | 51531201B |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Kaydon Corporation Dba Kaydon Corp |
| Status | ACTIVE |
| Surface Finish | GROUND |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Overall Outside Diameter | 6.0000 INCHES NOMINAL IN |
| Contact Angle | 11.0 DEGREES NOMINAL |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 4.5000 INCHES NOMINAL IN |
| Material | STEEL COMP E52100 BALL |
| Material | COPPER ALLOY RETAINER |
| Material | STEEL COMP E52100 INNER RACE |
| Material | STEEL COMP E52100 OUTER RACE |
| 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 |
|---|---|
| 51531201B PRIMARY | Kaydon Corporation Dba Kaydon Corp (USA) |
| Reference | Meaning |
|---|---|
| 177210 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 3110-01-442-6725 is a Bearing,ball,duplex, manufactured by Kaydon Corporation Dba Kaydon Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-442-6725 has 1 manufacturer part number on file: 51531201B (Kaydon Corporation Dba Kaydon Corp).
Key specifications for 51531201B: Surface Finish: GROUND; Style Designator: NON-LOADING GROOVE, NON-SEPARABLE, BACK TO BACK MOUNTING; Overall Width: 1.4600 INCHES MINIMUM AND 1.4700 INCHES MAXIMUM IN; Overall Outside Diameter: 6.0000 INCHES NOMINAL IN. 11 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.