The Piston,internal Combustion Engin, cataloged under National Stock Number 2805-00-459-3123, 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 23 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. 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 | 2805-00-459-3123 |
| Primary Part Number | A68304A |
| 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 | 0.0940 INCHES NOMINAL THIRD RING IN |
| Ring Groove Width | 0.0940 INCHES NOMINAL FIRST RING IN |
| Ring Groove Width | 0.0940 INCHES NOMINAL SECOND RING IN |
| Ring Groove Width | 0.1880 INCHES NOMINAL FOURTH RING IN |
| Distance Between Pin Bosses | 1.312 INCHES NOMINAL IN |
| Retaining Ring Groove | INCLUDED |
| Surface Finish | SEMIFINISHED |
| Skirt Slot Style | TELEPHONE SLOT |
| Oil Passage Type | HOLE LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 3.250 INCHES NOMINAL IN |
| Ring Groove Diameter | 2.875 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Distance From Pin Hole Center to Extreme Top | 1.750 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Oil Groove | INCLUDED |
| Head Style | FLAT |
| Ring Groove Quantity | 4 |
| Skirt Bottom Cutaway Feature | NOT INCLUDED |
| Ring | INCLUDED |
| Pinhole Diameter | 0.8750 INCHES NOMINAL IN |
| Pin Hole Bushing | 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 |
|---|---|
| A68304A PRIMARY | Dresser, Llc (USA) |
NSN 2805-00-459-3123 is a Piston,internal Combustion Engin, manufactured by Dresser, Llc, classified under FSC 2805, Gasoline Reciprocating Engines, Except Aircraft; and Components. Status: active.
NSN 2805-00-459-3123 has 1 manufacturer part number on file: A68304A (Dresser, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4710-00-970-3425. Verify interchangeability with system specifications before substitution.
Key specifications for A68304A: Overall Height: 3.500 INCHES NOMINAL IN; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.0940 INCHES NOMINAL THIRD RING IN; Ring Groove Width: 0.0940 INCHES NOMINAL FIRST RING IN. 23 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.