HM025-689-1: GEAR,SPUR.
The GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, body_style: WEBBED, WITH LIGHTENING HOLES, bore_style: INVOLUTE SPLINE BOTH ENDS, tooth_form: STANDARD, pitch_diameter: 4.4444 INCHES NOMINAL IN, pressure_angle: 20.0000 DEGREES. This part is cataloged in the U.S.
Government catalog under NSN 3020-01-238-8337, 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 COMP 4140 OVERALL |
| body_style | WEBBED, WITH LIGHTENING HOLES |
| bore_style | INVOLUTE SPLINE BOTH ENDS |
| tooth_form | STANDARD |
| pitch_diameter | 4.4444 INCHES NOMINAL IN |
| pressure_angle | 20.0000 DEGREES |
| teeth_quantity | 40 |
| hardness_rating | 31.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| spline_quantity | 14 BOTH ENDS |
| special_features | WITH 4 LIGHTENING HOLES EQUALLY SPACED WITHIN 0.060 IN,1.250 IN DIA IN |
| style_designator | FLUSH HUB |
| attachment_method | MOUNTING HOLE |
| NSN | 3020-01-238-8337 |
| BORE NOMINAL DIAMETER | 0.644 INCHES BOTH ENDS IN |
| HUB NOMINAL DIAMETER | 0.875 INCHES BOTH ENDS IN |
| TEETH QUANTITY | 40 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| BODY STYLE | WEBBED, WITH LIGHTENING HOLES |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| MOUNTING HOLE TYPE AND QUANTITY | 4 PLAIN AXIALLY THROUGH BODY FIRST END |
| PRECISION CLASSIFICATION | QUALITY NUMBER 8 |
| MOUNTING HOLE NOMINAL DIAMETER | 0.094 INCHES AXIALLY THROUGH BODY FIRST END IN |
| HARDNESS RATING | 31.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |