The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-200-0142, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-200-0142 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.0970 INCHES MINIMUM AND 0.0980 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Width | 0.1265 INCHES MINIMUM AND 0.1275 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM FOURTH RING IN |
| Distance Between Pin Bosses | 1.750 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Oil Passage Type | SLOT LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 4.250 INCHES NOMINAL IN |
| Ring Groove Diameter | 3.810 INCHES MINIMUM AND 3.820 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 3.834 INCHES MINIMUM AND 3.844 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Diameter | 3.874 INCHES MINIMUM AND 3.884 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 3.874 INCHES MINIMUM AND 3.884 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.312 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | LOCKING |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 4 |
| Oversize | 0.040 INCHES NOMINAL IN |
| Skirt Bottom Cutaway Feature | INCLUDED |
| Finished Size Designation | OVERSIZE |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 1.2500 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM ALLOY |
| Skirt Type | SEMISPLIT |
| 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 |
|---|---|
| MS13889 | 4/1 Identification reference U.S. Government activity |
NSN 2805-00-200-0142 is a Piston,internal Combustion Engin, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
Key specifications for 2805-00-200-0142: Overall Height: 4.875 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0970 INCHES MINIMUM AND 0.0980 INCHES MAXIMUM FIRST RING IN; Ring Groove Width: 0.1265 INCHES MINIMUM AND 0.1275 INCHES MAXIMUM SECOND 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.