The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-491-3304, 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 Federal-Mogul Corp Government Sales Dept. Government technical data includes 27 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-491-3304 |
| Primary Part Number | 407P+40 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Federal-Mogul Corp Government Sales Dept |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1880 INCHES NOMINAL THIRD RING IN |
| Ring Groove Width | 0.0780 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.0780 INCHES NOMINAL SECOND RING IN |
| Distance Between Pin Bosses | 1.440 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Diameter | 3.910 INCHES NOMINAL IN |
| Ring Groove Diameter | 3.471 INCHES MINIMUM AND 3.486 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 3.471 INCHES MINIMUM AND 3.486 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 3.498 INCHES MINIMUM AND 3.508 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 1.766 INCHES NOMINAL IN |
| Pin | INCLUDED |
| Pin Type for Which Designed | LOCKING |
| Oil Groove | INCLUDED |
| Head Style | DISH |
| Ring Groove Quantity | 3 |
| Oversize | 0.040 INCHES NOMINAL IN |
| Skirt Bottom Cutaway Feature | INCLUDED |
| Finished Size Designation | OVERSIZE |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 0.9840 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM ALLOY |
| Skirt Type | SOLID |
| Cut Depth | 0.960 INCHES NOMINAL IN |
| 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 |
|---|---|
| 2808522 | Chrysler Realty Company Llc Dba Daimler Chrysler (USA) |
| 407P+40 PRIMARY | Federal-Mogul Corp Government Sales Dept (USA) |
| 407-PP40 | Hastings Manufacturing Co Div Hastings Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| 2808522 | 3/2 Design control — primary reference U.S. Government activity |
| 993P040 | 5/9 Secondary reference Nylen Products Inc |
| 1727P040 | 5/9 Secondary reference Dana Corp Engine Products Div |
| 2268P040 | 5/9 Secondary reference Bosch Automotive Service Solutions Inc. |
| P279P040 | 3/2 Design control — primary reference U.S. Government activity |
| 2268P040 | 5/9 Secondary reference Spx Corp |
| 993PC40 | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-491-3304 is a Piston,internal Combustion Engin, manufactured by Federal-Mogul Corp Government Sales Dept, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-491-3304 has 3 manufacturer part numbers on file: 2808522 (Chrysler Realty Company Llc Dba Daimler Chrysler), 407P+40 (Federal-Mogul Corp Government Sales Dept), 407-PP40 (Hastings Manufacturing Co Div Hastings Manufacturing Company).
Key specifications for 407P+40: Overall Height: 3.415 INCHES MINIMUM AND 3.425 INCHES MAXIMUM IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1880 INCHES NOMINAL THIRD RING IN; Ring Groove Width: 0.0780 INCHES NOMINAL 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.