HEAT SINK,ELECTRICAL-ELECTRONIC. Key specifications include material: STEEL OVERALL, body_style: PLAIN, SOLID, bore_style: INVOLUTE SPLINE BOTH ENDS, pitch_diameter: 4.0000 INCHES NOMINAL IN, pressure_angle: 14.5000 DEGREES, teeth_quantity: 64. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3020-00-210-1778, 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.
| material | STEEL OVERALL |
| body_style | PLAIN, SOLID |
| bore_style | INVOLUTE SPLINE BOTH ENDS |
| pitch_diameter | 4.0000 INCHES NOMINAL IN |
| pressure_angle | 14.5000 DEGREES |
| teeth_quantity | 64 |
| spline_quantity | 36 BOTH ENDS |
| style_designator | PROTRUDING HUBS |
| face_nominal_width | 0.500 INCHES IN |
| hub_nominal_diameter | 3.000 INCHES BOTH ENDS IN |
| hub_style_designator | PLAIN BOTH ENDS |
| bore_nominal_diameter | 2.3125 INCHES BOTH ENDS IN |
| NSN | 3020-00-210-1778 |
| HUB NOMINAL DIAMETER | 3.000 INCHES BOTH ENDS IN |
| TEETH QUANTITY | 64 |
| SPLINE QUANTITY | 36 BOTH ENDS |
| NOMINAL OUTSIDE DIAMETER | 4.125 INCHES IN |
| SPLINE PITCH DIAMETER | 2.2500 INCHES NOMINAL BOTH ENDS IN |
| BORE NOMINAL DIAMETER | 2.3125 INCHES BOTH ENDS IN |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| PITCH DIAMETER | 4.0000 INCHES NOMINAL IN |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.625 INCHES FIRST END IN |
| STYLE DESIGNATOR | PROTRUDING HUBS |