The Bearing,ball,annular, cataloged under National Stock Number 3110-00-640-8039, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Ge Aviation Systems Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-00-640-8039 |
| Primary Part Number | 74398-01 |
| Item Name | Bearing,ball,annular |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Internal Clearance | 0.0004 INCHES MINIMUM RADIAL AND 0.0007 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Style Designator | LOADING GROOVE, NON-SEPARABLE |
| Overall Outside Diameter | 0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN |
| Bore Shape | STRAIGHT |
| Load Direction | RADIAL |
| Standard Tolerance Designation | ABEC NO.5 |
| Bore Diameter | 0.0398 INCHES MINIMUM AND 0.0400 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 74398-01 PRIMARY | Ge Aviation Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 12W16K47-12 | 5/2 Secondary reference U.S. Government activity |
| 2K5 | 5/1 Secondary reference Mpb Corp Div Timken Super Precision |
| 12K47 | 5/1 Secondary reference U.S. Government activity |
NSN 3110-00-640-8039 is a Bearing,ball,annular, manufactured by Ge Aviation Systems Llc, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-00-640-8039 has 1 manufacturer part number on file: 74398-01 (Ge Aviation Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 2530-00-741-7506. Verify interchangeability with system specifications before substitution.
Key specifications for 74398-01: Internal Clearance: 0.0004 INCHES MINIMUM RADIAL AND 0.0007 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND; Style Designator: LOADING GROOVE, NON-SEPARABLE; Overall Width: 0.0459 INCHES MINIMUM AND 0.0469 INCHES MAXIMUM IN. 9 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.