The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-792-8254, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Rolls-Royce Solutions America Inc. Government technical data includes 25 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-792-8254 |
| Primary Part Number | 5195931 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1000 INCHES NOMINAL SECOND RING IN |
| Ring Groove Width | 0.0850 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.1000 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Width | 0.1000 INCHES NOMINAL THIRD RING IN |
| Distance Between Pin Bosses | 1.781 INCHES NOMINAL IN |
| Retaining Ring Groove | NOT INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NUMBER 1,NUMBER 2,NUMBER 3,AND NUMBER 4 PISTON ALL RINGS |
| Diameter | 3.868 INCHES NOMINAL IN |
| Ring Groove Diameter | 3.500 INCHES NOMINAL ALL RINGS IN |
| Distance From Pin Hole Center to Extreme Top | 3.188 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | DISH |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 1.3800 INCHES NOMINAL IN |
| Pin Hole Bushing | INCLUDED |
| Material | STEEL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 5195931 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
NSN 2815-00-792-8254 is a Piston,internal Combustion Engin, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-792-8254 has 1 manufacturer part number on file: 5195931 (Rolls-Royce Solutions America Inc).
Key specifications for 5195931: Overall Height: 5.438 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1000 INCHES NOMINAL SECOND RING IN; Ring Groove Width: 0.0850 INCHES NOMINAL FIRST RING IN. 25 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.