The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-239-7693, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Mpb Corp Div Timken Super Precision. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-00-239-7693 |
| Primary Part Number | S2128M5LY167DB40LB |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corp Div Timken Super Precision |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Bearing Preload Rating | 40.0 POUNDS NOMINAL LBS |
| Surface Finish | GROUND |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Material Document and Classification | UNABLE TO DECODE |
| Overall Outside Diameter | 1.7496 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN |
| Load Direction | ANGULAR |
| Bore Diameter | 1.3122 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | GREASE LUBRICATION |
| Material | PLASTIC PHENOLIC RETAINER |
| Material | STEEL COMP 440C BALL |
| Lubrication Material Document and Classification | MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE |
| 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 |
|---|---|
| S2128M5LY167DB40LB PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| G201-072-002 PRIMARY | Bae Systems Information and Electronic Systems Integration Inc. (USA) |
| Reference | Meaning |
|---|---|
| SR542B31C168-1 | 5/9 Secondary reference U.S. Government activity |
| 3TAR21-28ULY70 | 5/9 Secondary reference Mpb Corporation Dba Mpb Corp |
| G201-072-002 | 5/9 Secondary reference U.S. Government activity |
NSN 3110-00-239-7693 is a Bearing,ball,duplex, manufactured by Mpb Corp Div Timken Super Precision, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-239-7693 has 2 manufacturer part numbers on file: S2128M5LY167DB40LB (Mpb Corp Div Timken Super Precision), G201-072-002 (Bae Systems Information and Electronic Systems Integration Inc.).
Key specifications for S2128M5LY167DB40LB: Retainer Fabrication Method: MACHINED; Bearing Preload Rating: 40.0 POUNDS NOMINAL LBS; Surface Finish: GROUND; Style Designator: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING. 14 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.