The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-424-4795, 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 Dresser, Llc. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-424-4795 |
| Primary Part Number | 145104W |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2805 / 28 — Gasoline Reciprocating Engines, Except Aircraft; and Components |
| Manufacturer | Dresser, Llc |
| Status | ACTIVE |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1270 INCHES NOMINAL SECOND RING IN |
| Ring Groove Width | 0.1270 INCHES NOMINAL THIRD RING IN |
| Ring Groove Width | 0.1290 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.2510 INCHES NOMINAL FIFTH RING IN |
| Ring Groove Width | 0.2510 INCHES NOMINAL FOURTH RING IN |
| Distance Between Pin Bosses | 2.125 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | FINISHED |
| Ring Groove Position and Quantity | NUMBER 1,NUMBER 2,NUMBER 3,NUMBER 4,AND NUMBER 5 PISTON ALL RINGS |
| Oil Passage Type | HOLE AND SLOT FIFTH RING |
| Diameter | 5.243 INCHES NOMINAL IN |
| Ring Groove Diameter | 4.663 INCHES MINIMUM AND 4.673 INCHES MAXIMUM FIRST RING IN |
| Ring Groove Diameter | 4.743 INCHES MINIMUM AND 4.758 INCHES MAXIMUM FIFTH RING IN |
| Ring Groove Diameter | 4.743 INCHES MINIMUM AND 4.758 INCHES MAXIMUM FOURTH RING IN |
| Ring Groove Diameter | 4.783 INCHES MINIMUM AND 4.798 INCHES MAXIMUM SECOND RING IN |
| Ring Groove Diameter | 4.783 INCHES MINIMUM AND 4.798 INCHES MAXIMUM THIRD RING IN |
| Distance From Pin Hole Center to Extreme Top | 2.998 INCHES MINIMUM AND 3.002 INCHES MAXIMUM IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | INCLUDED |
| Head Style | DISH |
| Ring Groove Quantity | 5 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 1.6250 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| 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 |
|---|---|
| 145104W PRIMARY | Dresser, Llc (USA) |
| Reference | Meaning |
|---|---|
| 145104C | 5/9 Secondary reference Dresser, Llc |
| A987P | 5/9 Secondary reference U.S. Government activity |
NSN 2805-00-424-4795 is a Piston,internal Combustion Engin, manufactured by Dresser, Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-424-4795 has 1 manufacturer part number on file: 145104W (Dresser, Llc).
Key specifications for 145104W: Overall Height: 6.250 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1270 INCHES NOMINAL SECOND RING IN; Ring Groove Width: 0.1270 INCHES NOMINAL THIRD RING IN. 29 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.