The Piston,internal Combustion Engin, cataloged under National Stock Number 2810-00-554-2145, is classified within Federal Supply Class 2810 (Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components) of the Engines, Turbines, and Components group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2810-00-554-2145 |
| Item Name | Piston,internal Combustion Engin |
| FSC / FSG | 2810 / 28 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components |
| Status | ACTIVE |
| FSC Application Data | ENGINE,RECIPROCATING,AIRCRAFT |
| Carbon Groove | NOT INCLUDED |
| Ring Groove Width | 0.1280 INCHES NOMINAL AND 0.1890 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Distance Between Pin Bosses | 1.750 INCHES NOMINAL IN |
| Retaining Ring Groove | NOT INCLUDED |
| Surface Finish | FINISHED |
| Oil Passage Type | HOLE LOCATION NOT OTHERWISE SPECIFIED |
| Diameter | 4.8341 INCHES NOMINAL IN |
| Ring Groove Diameter | 4.395 INCHES NOMINAL SECOND RING IN |
| Ring Groove Diameter | 4.416 INCHES NOMINAL FIRST RING IN |
| Distance From Pin Hole Center to Extreme Top | 1.7225 INCHES NOMINAL IN |
| Pin | NOT INCLUDED |
| Pin Type for Which Designed | FLOATING |
| Oil Groove | NOT INCLUDED |
| Head Style | HUMP |
| Ring Groove Quantity | 3 |
| Skirt Bottom Cutaway Feature | INCLUDED |
| Finished Size Designation | STANDARD |
| Ring | NOT INCLUDED |
| Surface Treatment | TIN |
| Pinhole Diameter | 1.1247 INCHES NOMINAL IN |
| Pin Hole Bushing | NOT INCLUDED |
| Material | ALUMINUM |
| Skirt Type | SOLID |
| Groove Taper Angle | 7 DEG 26 MINUTES PORM 15 MINUTES |
| Cut Depth | 0.5475 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 |
| Reference | Meaning |
|---|---|
| 69958 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2810-00-554-2145 is a Piston,internal Combustion Engin, classified under FSC 2810, Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components. Status: active.
Key specifications for 2810-00-554-2145: Overall Height: 3.200 INCHES NOMINAL IN; FSC Application Data: ENGINE,RECIPROCATING,AIRCRAFT; Carbon Groove: NOT INCLUDED; Ring Groove Width: 0.1280 INCHES NOMINAL AND 0.1890 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN. 26 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.