The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-01-079-6959, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2815-01-079-6959 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.2510 INCHES MINIMUM AND 0.2540 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN |
| Distance Between Pin Bosses | 6.612 INCHES NOMINAL IN |
| Retaining Ring Groove | NOT INCLUDED |
| Surface Finish | FINISHEDFINISHED |
| Diameter | 8.488 INCHES NOMINAL8.488 INCHES NOMINAL IN |
| Ring Groove Diameter | 7.736 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Distance From Pin Hole Center to Extreme Top | 6.500 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | LOCKING |
| Oil Groove | NOT INCLUDED |
| Head Style | CAVITYCAVITY |
| Ring Groove Quantity | 55 |
| Skirt Bottom Cutaway Feature | NOT INCLUDEDNOT INCLUDED |
| Finished Size Designation | STANDARDSTANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 3.6840 INCHES MINIMUM AND 3.6840 INCHES MINIMUM AND 3.6850 INCHES MAXIMUM3.6850 INCHES MAXIMUM IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | STEEL |
| Skirt Type | SOLIDSOLID |
| 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 |
|---|---|
| 8416846 | 3/9 Design control — primary reference General Motors Corp Electro-Motive Div |
| 8318992 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
NSN 2815-01-079-6959 is a Piston,internal Combustion Engin, classified under FSC 2815, Diesel Engines and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5998-01-303-3451. Verify interchangeability with system specifications before substitution.
Key specifications for 2815-01-079-6959: Overall Height: 13.656 INCHES NOMINAL13.656 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.2510 INCHES MINIMUM AND 0.2540 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN; Distance Between Pin Bosses: 6.612 INCHES NOMINAL IN. 20 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.