The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-209-8129, 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 15 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-209-8129 |
| Primary Part Number | 13084181 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corporation Dba Mpb Corp |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Bearing Preload Rating | 30.0 POUNDS MINIMUM AND 40.0 POUNDS MAXIMUM LBS |
| Internal Fit-Up Designation | STANDARD |
| Surface Finish | GROUND |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Overall Outside Diameter | 1.7500 INCHES NOMINAL IN |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO. 7T |
| Bore Diameter | 1.3125 INCHES NOMINAL IN |
| Material | STEEL COMP 440C INNER RING |
| Material | OIL LUBRICATION |
| Material | STEEL COMP 440C OUTER RING |
| Material | COTTON AND PLASTIC PHENOLIC RETAINER |
| Material | STEEL COMP 440C BALL |
| Lubrication Material Document and Classification | RL743,FSCM 19135 MFR REF 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 |
|---|---|
| 13084181 PRIMARY | Mpb Corporation Dba Mpb Corp (USA) |
| 13084181 PRIMARY | Kaydon Corporation Dba Kaydon Corp (USA) |
| 13084181 PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| Reference | Meaning |
|---|---|
| SR542B31C48W-1A7 | 5/1 Secondary reference U.S. Government activity |
| 13084181 | 7/9 Vendor item drawing reference Program Manager Advanced Attack Helicopter Barcom Amcpm-Aah |
| 13696201 | 5/1 Secondary reference Kaydon Corporation Dba Kaydon Corp |
| S2128MF-DB30-40 | 5/1 Secondary reference Mpb Corp Div Timken Super Precision |
| 13084181 | 3/2 Design control — primary reference U.S. Government activity |
| 3TAR21-28-SU-DB30/40LYVC-254 | 5/1 Secondary reference Mpb Corporation Dba Mpb Corp |
NSN 3110-01-209-8129 is a Bearing,ball,duplex, manufactured by Mpb Corporation Dba Mpb Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-209-8129 has 3 manufacturer part numbers on file: 13084181 (Mpb Corporation Dba Mpb Corp), 13084181 (Kaydon Corporation Dba Kaydon Corp), 13084181 (Mpb Corp Div Timken Super Precision).
Key specifications for 13084181: Retainer Fabrication Method: MACHINED; Bearing Preload Rating: 30.0 POUNDS MINIMUM AND 40.0 POUNDS MAXIMUM LBS; Internal Fit-Up Designation: STANDARD; Surface Finish: GROUND. 15 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.