The Ring,piston, cataloged under National Stock Number 2805-00-478-8628, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2805-00-478-8628 |
| Item Name | Ring,piston |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Status | ACTIVE |
| Bore Diameter Oversize | 0.015 INCHES IN |
| Material Document and Classification | AMS 7312 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | INSIDE BEVEL, UPPER, STRAIGHT FACE |
| Radial Wall Thickness | 0.0930 INCHES MINIMUM AND 0.0940 INCHES MAXIMUM IN |
| Ring Style | CONCENTRIC |
| Surface Treatment | CHROMIUM OVERALL |
| Standard Bore Diameter | 4.063 INCHES IN |
| Material | IRON OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 36044P15 | 3/9 Design control — primary reference Teledyne Industries Inc Teledyne Power Systems Div |
NSN 2805-00-478-8628 is a Ring,piston, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
Key specifications for 2805-00-478-8628: Bore Diameter Oversize: 0.015 INCHES IN; Overall Width: 0.0970 INCHES MAXIMUM IN; Material Document and Classification: AMS 7312 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: INSIDE BEVEL, UPPER, STRAIGHT FACE. 8 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.