The Bearing,ball,annular, cataloged under National Stock Number 3110-01-340-9926, 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 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-340-9926 |
| Primary Part Number | 109KS21 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Mpb Corporation Dba Mpb Corp |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Internal Clearance | 0.0009 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE RETAINER |
| Surface Finish | GROUND |
| Precious Material | SILVER |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Material Document and Classification | AMS 6414 ASSN STD SINGLE MATERIAL RESPONSE RETAINER |
| Material Document and Classification | AMS 6444 ASSN STD SINGLE MATERIAL RESPONSE INNER RING |
| Material Document and Classification | AMS 6444 ASSN STD SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | AMS 6444 ASSN STD SINGLE MATERIAL RESPONSE BALL |
| Overall Outside Diameter | 2.9525 INCHES MINIMUM AND 2.9528 INCHES MAXIMUM IN |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Alignment Type | RIGID |
| Surface Treatment | SILVER RETAINER |
| Precious Material and Location | PLATED ON RETAINER SILVER |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 1.7715 INCHES MINIMUM AND 1.7717 INCHES MAXIMUM IN |
| Material | STEEL COMP 4340 RETAINER |
| Material | STEEL COMP E52100 BALL |
| Material | STEEL COMP E52100 OUTER RING |
| Material | STEEL COMP E52100 INNER RING |
| 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 |
|---|---|
| 109KS21 PRIMARY | Mpb Corporation Dba Mpb Corp (USA) |
| 26HKH109-100 PRIMARY | Skf Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| 5907399 | 1/2 Source control — Government-approved source U.S. Government activity |
| JV9109KVM5MSRA | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3110-01-340-9926 is a Bearing,ball,annular, manufactured by Mpb Corporation Dba Mpb Corp, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-340-9926 has 2 manufacturer part numbers on file: 109KS21 (Mpb Corporation Dba Mpb Corp), 26HKH109-100 (Skf Usa Inc.).
Key specifications for 109KS21: Retainer Fabrication Method: PRESSED; Internal Clearance: 0.0009 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE RETAINER; Surface Finish: GROUND. 22 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.