A-1553NP: PISTON,INTERNAL COMBUSTION ENGIN.
PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include weight: 66.0 OUNCES OZ, diameter: 4.570 INCHES NOMINAL IN, material: ALUMINUM ALLOY, head_style: CAVITY, oil_groove: INCLUDED, skirt_type: SOLID. This part is cataloged in the U.S.
Government catalog under NSN 2805-00-375-7639, 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.
| weight | 66.0 OUNCES OZ |
| diameter | 4.570 INCHES NOMINAL IN |
| material | ALUMINUM ALLOY |
| head_style | CAVITY |
| oil_groove | INCLUDED |
| skirt_type | SOLID |
| carbon_groove | NOT INCLUDED |
| overall_height | 5.257 INCHES NOMINAL IN |
| surface_finish | SEMIFINISHED |
| pin_hole_bushing | NOT INCLUDED |
| pinhole_diameter | 1.8000 INCHES NOMINAL IN |
| ring_groove_width | 0.2750 INCHES NOMINAL AND 0.0960 INCHES NOMINAL AND 0.2510 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| NSN | 2805-00-375-7639 |
| OVERALL HEIGHT | 5.257 INCHES NOMINAL IN |
| CARBON GROOVE | NOT INCLUDED |
| RING GROOVE WIDTH | 0.2750 INCHES NOMINAL AND 0.0960 INCHES NOMINAL AND 0.2510 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| DISTANCE BETWEEN PIN BOSSES | 1.920 INCHES NOMINAL IN |
| RETAINING RING GROOVE | NOT INCLUDED |
| SURFACE FINISH | SEMIFINISHED |
| DIAMETER | 4.570 INCHES NOMINAL IN |
| RING GROOVE DIAMETER | 4.133 INCHES NOMINAL FIRST RING IN |
| RING GROOVE DIAMETER | 4.133 INCHES NOMINAL SECOND RING IN |
| RING GROOVE DIAMETER | 4.146 INCHES NOMINAL THIRD RING IN |