| ATTACHMENT METHOD | MOUNTING HOLE |
| BACKLASH DESIGNATION | GRADE A |
| BODY STYLE | PLAIN, SOLID |
| BOLT HOLE CIRCLE NOMINAL DIAMETER | 2.750 INCHES AXIALLY THROUGH BODY, FIRST END |
| BORE STYLE | INVOLUTE SPLINE BOTH ENDS |
| BORE NOMINAL DIAMETER | 0.758 INCHES BOTH ENDS |
| COUNTERBORE NOMINAL DIAMETER | 0.875 INCHES FIRST END |
| COUNTERBORE NOMINAL DEPTH | 0.937 INCHES FIRST END |
| FACE NOMINAL WIDTH | 0.375 INCHES |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM HUB |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM TEETH |
| HUB NOMINAL DIAMETER | 1.249 INCHES FIRST END |
| HUB STYLE DESIGNATOR | PLAIN FIRST END |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-13048 MIL SPEC SINGLE MATERIAL RESPONSE AND QQ-S-681 CL 105-85 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| MOUNTING HOLE NOMINAL DIAMETER | 0.307 INCHES AXIALLY THROUGH BODY, FIRST END |
| MOUNTING HOLE NOMINAL DIAMETER | 0.380 INCHES AXIALLY THROUGH BODY, SECOND END |
| MOUNTING HOLE TYPE AND QUANTITY | 1 PLAIN AXIALLY THROUGH BODY, FIRST END |
| MOUNTING HOLE TYPE AND QUANTITY | 2 PLAIN AXIALLY THROUGH BODY, SECOND END |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 1.312 INCHES FIRST END |
| NOMINAL OVERALL LENGTH | 1.687 INCHES |
| NOMINAL OUTSIDE DIAMETER | 4.400 INCHES |
| SPECIAL FEATURES | 63 MICROINCH AA FINISH ON OD SURFACE OF HUB,HUB END CHAMFERED TO 0.0312 IN.BY 45 DEG,SPLINED BORE COUNTERSUNK TO 0.0312 BY 30 DEG ON FIRST END,1 SPLINED TOOTH OMITTED IN LINE W/0. 307 IN.HOLE AND SPUR GEAR TOOTH |
| PITCH DIAMETER | 4.0000 INCHES NOMINAL |
| PRESSURE ANGLE | 25.0000 DEGREES |
| SPLINE PITCH DIAMETER | 0.7290 INCHES NOMINAL BOTH ENDS |
| SPLINE QUANTITY | 35 BOTH ENDS |
| STYLE DESIGNATOR | PROTRUDING HUB |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-16232 TYPE M,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE MANGANESE OVERALL |
| TEETH QUANTITY | 16 |
| TOOTH FORM | STUB |