The Bearing,ball,annular, cataloged under National Stock Number 3110-00-428-6505, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-428-6505 |
| Primary Part Number | CYRB278-1 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| Status | ACTIVE |
| Retainer Fabrication Method | PRESSED |
| Lubrication Material | GREASE |
| Internal Clearance | 0.0001 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Shield Quantity | 2 |
| Style Designator | NON-LOADING GROOVE, NON-SEPARABLE |
| Material Document and Classification | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE OUTER RING |
| Material Document and Classification | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE BALL |
| Material Document and Classification | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE INNER RING |
| Material Document and Classification | CYRB278-1,05624 MFR REF SINGLE MATERIAL RESPONSE RETAINER |
| Material Document and Classification | CYRB278-1,05624 MFR REF SINGLE MATERIAL RESPONSE SHIELD |
| Overall Outside Diameter | 0.6250 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Standard Tolerance Designation | ABEC NO.1 |
| Bore Diameter | 0.2500 INCHES NOMINAL IN |
| Material | STEEL COMP 440C INNER RING |
| Material | STEEL COMP 440C OUTER RING |
| Material | STEEL RETAINER |
| Material | STEEL COMP 440C BALL |
| Material | STEEL SHIELD |
| Lubrication Material Document and Classification | MIL-G-81322 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 |
|---|---|
| CYRB278-1 PRIMARY | Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA) |
| CYRB278-1 PRIMARY | New Hampshire Ball Bearings Inc Div Precision Division (USA) |
| Reference | Meaning |
|---|---|
| CYRB278-1-0-24 | 5/1 Secondary reference Ge Aviation Systems Llc Dba Ge Aviation Systems Llc |
| R4FFMST | 5/9 Secondary reference Skf Usa Inc. |
| SR41PPK15 | 5/1 Secondary reference New Hampshire Ball Bearings Inc Div Precision Division |
| SR41PPK15 | 5/9 Secondary reference U.S. Government activity |
| CYRB278-1 | 5/9 Secondary reference Skf Usa Inc. |
NSN 3110-00-428-6505 is a Bearing,ball,annular, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-428-6505 has 2 manufacturer part numbers on file: CYRB278-1 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc), CYRB278-1 (New Hampshire Ball Bearings Inc Div Precision Division).
Key specifications for CYRB278-1: Retainer Fabrication Method: PRESSED; Lubrication Material: GREASE; Internal Clearance: 0.0001 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN; 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.