The Ring,wearing, cataloged under National Stock Number 2935-01-138-4259, is classified within Federal Supply Class 2935 (Engine System Cooling Components, Aircraft Prime Moving) of the Engine Accessories group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2935-01-138-4259 |
| Item Name | Ring,wearing |
| FSC / FSG | 2935 / 29 — Engine System Cooling Components, Aircraft Prime Moving |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES OUTSIDE |
| Surface Finish | 250.0 MICROINCHES COUNTERBORE |
| Surface Finish | 250.0 MICROINCHES INSIDE |
| Surface Finish | 250.0 MICROINCHES LEFT FACE |
| Surface Finish | 250.0 MICROINCHES RIGHT FACE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN W/INTERNAL FLANGE |
| Body Outside Diameter | 7.874 INCHES MINIMUM AND 7.875 INCHES MAXIMUM IN |
| Internal Flange Inside Diameter | 7.360 INCHES MINIMUM AND 7.365 INCHES MAXIMUM IN |
| Body Inside Diameter | 7.375 INCHES MINIMUM AND 7.376 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| Internal Flange Width | 0.234 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 506-4478700 PIECE 65 | 3/9 Design control — primary reference U.S. Government activity |
NSN 2935-01-138-4259 is a Ring,wearing, classified under FSC 2935, Engine System Cooling Components, Aircraft Prime Moving. Status: active.
Key specifications for 2935-01-138-4259: Surface Finish: 125.0 MICROINCHES OUTSIDE; Surface Finish: 250.0 MICROINCHES COUNTERBORE; Surface Finish: 250.0 MICROINCHES INSIDE; Surface Finish: 250.0 MICROINCHES LEFT FACE. 12 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.
NSN 2935-01-138-4259 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.