The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-897-2940, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-897-2940 |
| Primary Part Number | SR4HDF |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Surface Finish | GROUND |
| Bearing Preload Designation | MEDIUM |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, FACE TO FACE MOUNTING |
| Overall Outside Diameter | 0.6250 INCHES NOMINAL IN |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 0.2500 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OUTER RING |
| Material | STEEL CORROSION RESISTING INNER RING |
| Material | STEEL CORROSION RESISTING BALL |
| Material | PLASTIC PHENOLIC RETAINER |
| 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 |
|---|---|
| SR4HDF PRIMARY | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation (USA) |
| 547A002867 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
NSN 3110-00-897-2940 is a Bearing,ball,duplex, manufactured by Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-897-2940 has 2 manufacturer part numbers on file: SR4HDF (Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation), 547A002867 (L3 Technologies, Inc. Div L3 Keo).
Key specifications for SR4HDF: Retainer Fabrication Method: MACHINED; Surface Finish: GROUND; Bearing Preload Designation: MEDIUM; Style Designator: COUNTERBORED OUTER RINGS, NON-SEPARABLE, FACE TO FACE MOUNTING. 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.