The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-209-9502, 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 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-209-9502 |
| Primary Part Number | E998-808-16 D-D |
| 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 | 1.75 POUNDS MINIMUM AND 2.25 POUNDS MAXIMUM LBS |
| Internal Clearance | 0.0006 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Material Document and Classification | UNABLE TO DECODE |
| Overall Outside Diameter | 0.406000 INCHES MINIMUM AND 0.406050 INCHES MAXIMUM IN |
| Contact Angle | 5.0 DEGREES MINIMUM AND 25.0 DEGREES MAXIMUM |
| Load Direction | ANGULAR |
| Surface Treatment | PASSIVATE OUTER RING |
| Surface Treatment | PASSIVATE INNER RING |
| Surface Treatment | PASSIVATE BALL |
| Bore Diameter | 0.234200 INCHES MINIMUM AND 0.234250 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 | 639AS3195 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 |
|---|---|
| 639AS6561-16 D-D | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| E998-808-16 D-D PRIMARY | Mpb Corp Div Timken Super Precision (USA) |
| Reference | Meaning |
|---|---|
| 639AS6522-16 D-D | 5/9 Secondary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| SR40415B30-16 D-D | 5/2 Secondary reference U.S. Government activity |
| E998-804-16 D-D | 5/9 Secondary reference Mpb Corp Div Timken Super Precision |
| SR40405B311A-16 D-D | 5/9 Secondary reference U.S. Government activity |
NSN 3110-01-209-9502 is a Bearing,ball,duplex, manufactured by Mpb Corp Div Timken Super Precision, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-209-9502 has 2 manufacturer part numbers on file: 639AS6561-16 D-D (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), E998-808-16 D-D (Mpb Corp Div Timken Super Precision).
Key specifications for E998-808-16 D-D: Retainer Fabrication Method: MACHINED; Bearing Preload Rating: 1.75 POUNDS MINIMUM AND 2.25 POUNDS MAXIMUM LBS; Internal Clearance: 0.0006 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND. 18 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.