The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-528-5664, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2815-00-528-5664 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Status | ACTIVE |
| Carbon Groove | INCLUDED |
| Ring Groove Width | 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Width | 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM THIRD RING IN |
| Ring Groove Width | 0.1875 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM FIFTH RING IN |
| Ring Groove Width | 0.1875 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM FOURTH RING IN |
| Distance Between Pin Bosses | 1.725 INCHES MINIMUM AND 1.765 INCHES MAXIMUM IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NUMBER 1,NUMBER 2,NUMBER 3,@NUMBER 4,AND NUMBER 5 PISTON ALL RINGS |
| Oil Passage Type | HOLE LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 4.000 INCHES NOMINAL IN |
| Ring Groove Diameter | 3.576 INCHES MINIMUM AND 3.586 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 3.616 INCHES MINIMUM AND 3.626 INCHES MAXIMUM FIRST RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.744 INCHES MINIMUM AND 2.749 INCHES MAXIMUM IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Head Style | FLAT |
| Ring Groove Quantity | 5 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 1.3752 INCHES MINIMUM AND 1.3760 INCHES MAXIMUM IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM |
| Skirt Type | SOLID |
| Unable to Decode | UNABLE TO DECODE |
| 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 |
|---|---|
| 7501 | 3/9 Design control — primary reference U.S. Government activity |
NSN 2815-00-528-5664 is a Piston,internal Combustion Engin, classified under FSC 2815, Diesel Engines and Components. Status: active.
Key specifications for 2815-00-528-5664: Overall Height: 5.250 INCHES NOMINAL IN; Carbon Groove: INCLUDED; Ring Groove Width: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM FIRST RING IN; Ring Groove Width: 0.1250 INCHES MINIMUM AND 0.1260 INCHES MAXIMUM SECOND RING IN. 27 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.