801-6406709-78: GEAR,INTERNAL.
The GEAR,INTERNAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, body_style: PLAIN, SOLID, bore_style: STRAIGHT SPLINE BETWEEN BODY AND FLANGE, teeth_type: SPUR, tooth_form: STUB, pitch_diameter: 4.2000 INCHES NOMINAL IN. This part is cataloged in the U.S.
Government catalog under NSN 3020-01-416-3312, 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 | STRAIGHT SPLINE BETWEEN BODY AND FLANGE |
| teeth_type | SPUR |
| tooth_form | STUB |
| pitch_diameter | 4.2000 INCHES NOMINAL IN |
| pressure_angle | 20.0000 DEGREES |
| teeth_quantity | 42 |
| hardness_rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| spline_quantity | 9 BOTH ENDS |
| style_designator | SOLID BACK RING, PROTRUDING HUB |
| end_nominal_length | 1.065 INCHES FIRST END IN |
| NSN | 3020-01-416-3312 |
| BORE NOMINAL DIAMETER | 1.503 INCHES BOTH ENDS IN |
| TEETH QUANTITY | 42 |
| SECOND STEP NOMINAL DIAMETER | 3.500 INCHES FIRST END IN |
| BODY STYLE | PLAIN, SOLID |
| BORE STYLE | STRAIGHT SPLINE BETWEEN BODY AND FLANGE |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 1.065 INCHES FIRST END IN |
| FIRST STEP NOMINAL LENGTH | 0.219 INCHES FIRST END IN |
| TEETH TYPE | SPUR |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| NOMINAL OVERALL LENGTH | 3.940 INCHES IN |