The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-618-9271, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Mpb Corporation Dba Mpb Corp. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-00-618-9271 |
| Primary Part Number | 510123 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corporation Dba Mpb Corp |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Surface Finish | GROUND |
| Bearing Preload Designation | LIGHT |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Overall Outside Diameter | 55.0 MILLIMETERS NOMINAL MM |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO.3 |
| Bore Diameter | 35.0 MILLIMETERS NOMINAL MM |
| Material | STEEL OUTER RING |
| Material | STEEL INNER RING |
| Material | STEEL BALL |
| 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 |
|---|---|
| 510123 PRIMARY | Mpb Corporation Dba Mpb Corp (USA) |
| 510123 PRIMARY | Skf Usa Inc. (USA) |
| 510123 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| M9307KMBRDBE6665 | Timken Co Div the Timken Company (USA) |
| Reference | Meaning |
|---|---|
| 1907RD3B | 5/1 Secondary reference Skf Usa Inc. |
| M9307K-MRB-DB-E6 | 5/1 Secondary reference Timken Co Div the Timken Company |
NSN 3110-00-618-9271 is a Bearing,ball,duplex, manufactured by Mpb Corporation Dba Mpb Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-618-9271 has 4 manufacturer part numbers on file: 510123 (Mpb Corporation Dba Mpb Corp), 510123 (Skf Usa Inc.), 510123 (Hamilton Sundstrand Corporation Dba Collins Aerospace), M9307KMBRDBE6665 (Timken Co Div the Timken Company).
Key specifications for 510123: Retainer Fabrication Method: MACHINED; Surface Finish: GROUND; Bearing Preload Designation: LIGHT; Style Designator: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING. 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.