The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-044-5301, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-044-5301 |
| Primary Part Number | SFR3STAX23K6DB21/2 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation |
| Status | ACTIVE |
| Bearing Preload Rating | 2.0 POUNDS NOMINAL LBS |
| Shield Quantity | 2 |
| Overall Outside Diameter | 0.49985 INCHES MINIMUM AND 0.50000 INCHES MAXIMUM IN |
| Load Direction | RADIAL |
| Standard Tolerance Designation | ABEC NO.7 |
| Bore Diameter | 0.1860 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OUTER RING |
| Material | STEEL CORROSION RESISTING INNER RING |
| Material | STEEL CORROSION RESISTING BALL |
| Material | PLASTIC PHENOLIC RETAINER |
| Material | STEEL CORROSION RESISTING SHIELD |
| 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 |
|---|---|
| SFR3STAX23K6DB21/2 PRIMARY | Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation (USA) |
| SR3FMCHSR3MCHDB2 1-2B458 PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| Reference | Meaning |
|---|---|
| 131-0213-001 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 3110-00-044-5301 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 3110-00-044-5301 has 2 manufacturer part numbers on file: SFR3STAX23K6DB21/2 (Schaeffler Aerospace Usa Corp Div Schaeffler Aerospace Usa Corporation), SR3FMCHSR3MCHDB2 1-2B458 (Mpb Corp Div Timken Super Precision).
Key specifications for SFR3STAX23K6DB21/2: Bearing Preload Rating: 2.0 POUNDS NOMINAL LBS; Shield Quantity: 2; Overall Width: 0.3900 INCHES MINIMUM AND 0.3920 INCHES MAXIMUM IN; Overall Outside Diameter: 0.49985 INCHES MINIMUM AND 0.50000 INCHES MAXIMUM 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.