The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-528-5703, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-528-5703 |
| Primary Part Number | NGA5G |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Width | 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM THIRD RING IN |
| Ring Groove Width | 0.1570 INCHES MINIMUM AND 0.1580 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.1575 INCHES MINIMUM AND 0.1585 INCHES MAXIMUM FIRST RING IN |
| Distance Between Pin Bosses | 2.562 INCHES MINIMUM AND 2.572 INCHES MAXIMUM 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 |
| Supplementary Features | OIL PASSAGE HOLE |
| Diameter | 5.515 INCHES MINIMUM AND 5.520 INCHES MAXIMUM IN |
| Ring Groove Diameter | 4.988 INCHES MINIMUM AND 4.998 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 4.988 INCHES MINIMUM AND 4.998 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Diameter | 4.988 INCHES MINIMUM AND 4.998 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 4.988 INCHES MINIMUM AND 4.998 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 4.620 INCHES MINIMUM AND 4.630 INCHES MAXIMUM IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | LOCKING |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 6 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | INCLUDED |
| Surface Treatment | TIN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | IRON |
| Skirt Type | SOLID |
| 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 |
|---|---|
| NGA5G PRIMARY | Fairbanks Morse, Llc (USA) |
| AM55S61-0976PC1 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| AM55S61-0976PC1 | 5/9 Secondary reference U.S. Government activity |
| 23NG6A5APC1 | 5/9 Secondary reference U.S. Government activity |
| NGA5G | 3/9 Design control — primary reference U.S. Government activity |
| 23NG6A5BPC1 | 5/9 Secondary reference U.S. Government activity |
| 10NG6A5PC1 | 5/9 Secondary reference U.S. Government activity |
NSN 2815-00-528-5703 is a Piston,internal Combustion Engin, manufactured by Fairbanks Morse, Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-528-5703 has 2 manufacturer part numbers on file: NGA5G (Fairbanks Morse, Llc), AM55S61-0976PC1 (Naval Sea Systems Command).
Key specifications for NGA5G: Overall Height: 7.375 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM FOURTH RING IN; Ring Groove Width: 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM THIRD 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.