The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-784-0727, 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 28 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-784-0727 |
| Primary Part Number | 5198572 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| FSC Application Data | DIESEL ENGINE,NONAIRCRAFT |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.0850 INCHES MINIMUM AND 0.0875 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Width | 0.0980 INCHES MINIMUM AND 0.1000 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Width | 0.0980 INCHES MINIMUM AND 0.1000 INCHES MAXIMUM THIRD RING IN |
| Ring Groove Width | 0.1000 INCHES MINIMUM AND 0.1020 INCHES MAXIMUM SECOND 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 SIXTH RING IN |
| Distance Between Pin Bosses | 1.820 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NUMBER 1,NUMBER 2,NUMBER 3,NUMBER 4,NUMBER @5,@AND NUMBER 6 PISTON ALL RINGS |
| Diameter | 3.845 INCHES NOMINAL IN |
| Ring Groove Diameter | 3.439 INCHES MINIMUM AND 3.447 INCHES MAXIMUM FIFTH RING IN |
| Ring Groove Diameter | 3.439 INCHES MINIMUM AND 3.447 INCHES MAXIMUM SIXTH RING IN |
| Ring Groove Diameter | 3.515 INCHES MINIMUM AND 3.525 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 3.515 INCHES MINIMUM AND 3.525 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Diameter | 3.515 INCHES MINIMUM AND 3.525 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 3.515 INCHES MINIMUM AND 3.525 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 3.150 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | CAVITY |
| Ring Groove Quantity | 6 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| 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 |
|---|---|
| 5198572 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| Reference | Meaning |
|---|---|
| 5198143 | 5/9 Secondary reference Rolls-Royce Solutions America Inc |
| 5198572 | 5/9 Secondary reference General Motors Corp |
| 2815007840727 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 5198143 | 5/9 Secondary reference General Motors Corp |
NSN 2815-00-784-0727 is a Piston,internal Combustion Engin, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-784-0727 has 1 manufacturer part number on file: 5198572 (Rolls-Royce Solutions America Inc).
Key specifications for 5198572: Overall Height: 5.425 INCHES NOMINAL IN; FSC Application Data: DIESEL ENGINE,NONAIRCRAFT; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0850 INCHES MINIMUM AND 0.0875 INCHES MAXIMUM FIRST RING IN. 28 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.