| DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 4.340 INCHES MINIMUM AND 4.360 INCHES MAXIMUM |
| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM |
| HOLE DIAMETER | 9.000 INCHES MINIMUM AND 9.020 INCHES MAXIMUM |
| INTERNAL KEY QUANTITY | 5 |
| INTERNAL STRAIGHT KEY WIDTH | 0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM |
| OUTSIDE DIAMETER | 9.530 INCHES MINIMUM AND 9.550 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL THICKNESS | 0.020 INCHES MINIMUM AND 0.028 INCHES MAXIMUM |
| MATERIAL | IRON ALLOY 660 OVERALL |
| STYLE DESIGNATOR | KEY |
| SURFACE FINISH | 250.0 MICROINCHES ALL SURFACES |