PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include diameter: 4.000 INCHES NOMINAL IN, cut_depth: 1.125 INCHES NOMINAL IN, head_style: DISH, oil_groove: INCLUDED, skirt_type: SOLID, carbon_groove: NOT INCLUDED. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-146-4734, 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 | 4.000 INCHES NOMINAL IN |
| cut_depth | 1.125 INCHES NOMINAL IN |
| head_style | DISH |
| oil_groove | INCLUDED |
| skirt_type | SOLID |
| carbon_groove | NOT INCLUDED |
| overall_height | 3.750 INCHES NOMINAL IN |
| surface_finish | FINISHED |
| oil_passage_type | SLOT THIRD RING |
| pin_hole_bushing | NOT INCLUDED |
| ring_groove_width | 0.0940 INCHES NOMINAL FIRST RING IN |
| ring_groove_diameter | 3.625 INCHES NOMINAL FIRST RING IN |
| NSN | 5360-00-146-4734 |
| MATERIAL | COPPER ALLOY 510 OVERALL |
| COIL QUANTITY | 7 |
| COIL HELIX DIRECTION | LEFT-HAND |
| STYLE DESIGNATOR | CYLINDRICAL |
| SPRING FREE LENGTH | 4.250 INCHES NOMINAL IN |
| END STYLE | SPRING END,SQUARED BOTH ENDS |
| INSIDE DIAMETER | 2.625 INCHES NOMINAL IN |
| SPRING FREE OUTSIDE DIAMETER | 2.955 INCHES NOMINAL IN |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-750,COMP A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |