| DESIGN FORM | PLAIN |
| TEETH ROW QUANTITY | 1 |
| TEETH QUANTITY PER ROW | 25 |
| TOOTH PITCH | 0.500 INCHES NOMINAL |
| MATERIAL | STEEL |
| STYLE DESIGNATOR | PLAIN |
| OUTSIDE DIAMETER | 4.260 INCHES NOMINAL |
| OVERALL LENGTH | 0.875 INCHES NOMINAL |
| PITCH DIAMETER | 3.989 INCHES NOMINAL |
| FACE WIDTH | 0.284 INCHES NOMINAL |
| HARDNESS RATING TEST METHOD | ROCKWELL |
| TEETH HARDNESS RATING | 55.0 ROCKWELL C MINIMUM AND |
| 62.0 ROCKWELL C MAXIMUM |
| METALLIC HARDNESS RATING AND LOCATION | 55.0 ROCKWELL C MINIMUM HUB AND |
| 62.0 ROCKWELL C MAXIMUM HUB |
| BORE TYPE | STRAIGHT |
| BORE DIAMETER | 2.501 INCHES MINIMUM AND |
| 2.5025 INCHES MAXIMUM |
| BORE LENGTH | 0.875 INCHES NOMINAL |
| KEYING FACILITY TYPE | KEYWAY |
| QUANTITY | 1 |
| KEYWAY WIDTH | 0.1885 INCHES MINIMUM AND |
| 0.1905 INCHES MAXIMUM |
| DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY | 1.3398 INCHES MINIMUM AND |
| 1.3505 INCHES MAXIMUM |
| PROTRUDING HUB CHARACTERISTIC | PLAIN |
| HUB OUTSIDE DIAMETER | 3.125 INCHES NOMINAL BOTH ENDS |
| FURNISHED ITEMS | KEYING FACILITY |
| DISTANCE FROM HUB END TO FLANGE END | 0.312 INCHES MINIMUM AND |
| 0.317 INCHES MAXIMUM AA END |
| 0.274 INCHES MINIMUM AND |
| 0.279 INCHES MAXIMUM BB END |
| SPECIAL FEATURES | 5/32 IN. BY 45 DEG CHAMFER AA END OF BORE |