The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-00-757-2223, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Cooper Machinery Services Llc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-00-757-2223 |
| Primary Part Number | M-4179 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Cooper Machinery Services Llc |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1900 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Width | 0.1900 INCHES NOMINAL THIRD RING IN |
| Ring Groove Width | 0.1950 INCHES NOMINAL SECOND RING IN |
| Ring Groove Width | 0.1980 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.3770 INCHES NOMINAL FIFTH RING IN |
| Distance Between Pin Bosses | 3.500 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Oil Passage Type | HOLE LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 8.000 INCHES NOMINAL IN |
| Ring Groove Diameter | 7.310 INCHES NOMINAL FIFTH RING IN |
| Ring Groove Diameter | 7.310 INCHES NOMINAL FIRST RING IN |
| Ring Groove Diameter | 7.310 INCHES NOMINAL FOURTH RING IN |
| Ring Groove Diameter | 7.310 INCHES NOMINAL SECOND RING IN |
| Ring Groove Diameter | 7.310 INCHES NOMINAL THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 4.722 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | INCLUDED |
| Head Style | RELIEVED |
| Ring Groove Quantity | 5 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 3.2500 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | STEEL |
| 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 |
|---|---|
| M-4179 PRIMARY | Cooper Machinery Services Llc (USA) |
NSN 2815-00-757-2223 is a Piston,internal Combustion Engin, manufactured by Cooper Machinery Services Llc, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-00-757-2223 has 1 manufacturer part number on file: M-4179 (Cooper Machinery Services Llc).
Key specifications for M-4179: Overall Height: 12.000 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1900 INCHES NOMINAL FOURTH RING IN; Ring Groove Width: 0.1900 INCHES NOMINAL 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.