4066-040: PISTON,INTERNAL COMBUSTION ENGIN.
PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include diameter: 3.875 INCHES NOMINAL IN, material: ALUMINUM, oversize: 0.040 INCHES NOMINAL IN, head_style: CONTOUR, oil_groove: INCLUDED, skirt_type: SOLID. This part is cataloged in the U.S.
Government catalog under NSN 2805-00-480-7544, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| diameter | 3.875 INCHES NOMINAL IN |
| material | ALUMINUM |
| oversize | 0.040 INCHES NOMINAL IN |
| head_style | CONTOUR |
| oil_groove | INCLUDED |
| skirt_type | SOLID |
| carbon_groove | NOT INCLUDED |
| overall_height | 4.237 INCHES MINIMUM AND 4.252 INCHES MAXIMUM IN |
| surface_finish | FINISHED |
| oil_passage_type | HOLE THIRD RING |
| pin_hole_bushing | NOT INCLUDED |
| pinhole_diameter | 1.1090 INCHES NOMINAL IN |
| NSN | 2805-00-480-7544 |
| OVERALL HEIGHT | 4.237 INCHES MINIMUM AND 4.252 INCHES MAXIMUM IN |
| CARBON GROOVE | NOT INCLUDED |
| RING GROOVE WIDTH | 0.1880 INCHES MINIMUM AND 0.1890 INCHES MAXIMUM THIRD RING IN |
| RING GROOVE WIDTH | 0.0970 INCHES MINIMUM AND 0.0980 INCHES MAXIMUM FIRST RING IN |
| RING GROOVE WIDTH | 0.0970 INCHES MINIMUM AND 0.0980 INCHES MAXIMUM SECOND RING IN |
| DISTANCE BETWEEN PIN BOSSES | 2.590 INCHES NOMINAL IN |
| RETAINING RING GROOVE | INCLUDED |
| SURFACE FINISH | FINISHED |
| OIL PASSAGE TYPE | HOLE THIRD RING |
| DIAMETER | 3.875 INCHES NOMINAL IN |