The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-951-1577, is classified within Federal Supply Class 2805 (Gasoline Reciprocating Engines, Except Aircraft; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 27 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 | 2805-00-951-1577 |
| Primary Part Number | 8M4301 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| FSC Application Data | GASOLINE RECIPROCATING ENGINE,STARTING ENGINE TYPE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.0955 INCHES MINIMUM FIRST RING IN |
| Ring Groove Width | 0.0965 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.1875 INCHES MINIMUM THIRD RING IN |
| Ring Groove Width | 0.1885 INCHES MAXIMUM FOURTH RING IN |
| Distance Between Pin Bosses | 1.240 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Diameter | 3.625 INCHES NOMINAL IN |
| Ring Groove Diameter | 3.211 INCHES MINIMUM FIRST RING IN |
| Ring Groove Diameter | 3.211 INCHES MINIMUM THIRD RING IN |
| Ring Groove Diameter | 3.221 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Diameter | 3.221 INCHES MAXIMUM SECOND RING IN |
| Distance From Pin Hole Center to Extreme Top | 1.810 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Pinhole Diameter | 0.8590 INCHES MINIMUM AND 0.8600 INCHES MAXIMUM IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM |
| 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 |
|---|---|
| 8M4301 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 2805-00-951-1577 is a Piston,internal Combustion Engin, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-951-1577 has 1 manufacturer part number on file: 8M4301 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 8M4301: Overall Height: 3.440 INCHES NOMINAL IN; FSC Application Data: GASOLINE RECIPROCATING ENGINE,STARTING ENGINE TYPE; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0955 INCHES MINIMUM FIRST RING IN. 27 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.