The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-374-9457, 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 M & S Cartage Inc. Government technical data includes 27 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-374-9457 |
| Primary Part Number | 423 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | M & S Cartage Inc |
| Status | ACTIVE |
| FSC Application Data | GASOLINE ENGINE,NONAIRCRAFT |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1255 INCHES MINIMUM AND 0.1265 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Width | 0.0960 INCHES MINIMUM AND 0.0970 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Width | 0.1255 INCHES MINIMUM AND 0.1265 INCHES MAXIMUM THIRD RING IN |
| Distance Between Pin Bosses | 1.500 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Diameter | 3.533 INCHES MINIMUM AND 3.537 INCHES MAXIMUM IN |
| Ring Groove Diameter | 3.155 INCHES MINIMUM AND 3.165 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 3.195 INCHES MINIMUM AND 3.205 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 3.195 INCHES MINIMUM AND 3.205 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.131 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 0.8747 INCHES MINIMUM AND 0.8749 INCHES MAXIMUM IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM |
| Skirt Type | SEMISPLIT |
| Cut Depth | 0.594 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| L934F020 | Eaton Corp Dba Eaton Aerospace Jackson (USA) |
| 423 PRIMARY | M & S Cartage Inc (USA) |
| Reference | Meaning |
|---|---|
| 423P | 5/9 Secondary reference M & S Cartage Inc |
| 79321R11 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 79321R11 | 5/2 Secondary reference U.S. Government activity |
NSN 2805-00-374-9457 is a Piston,internal Combustion Engin, manufactured by M & S Cartage Inc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-374-9457 has 2 manufacturer part numbers on file: L934F020 (Eaton Corp Dba Eaton Aerospace Jackson), 423 (M & S Cartage Inc).
1 possible match (shared part number, not a government interchangeability claim): 2805-00-757-4107. Verify interchangeability with system specifications before substitution.
Key specifications for 423: Overall Height: 3.881 INCHES MINIMUM AND 3.885 INCHES MAXIMUM IN; FSC Application Data: GASOLINE ENGINE,NONAIRCRAFT; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1255 INCHES MINIMUM AND 0.1265 INCHES MAXIMUM SECOND 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.
NSN 2805-00-374-9457 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.