| DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 0.665 INCHES MINIMUM AND 0.675 INCHES MAXIMUM |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM |
| HOLE DIAMETER | 1.510 INCHES MINIMUM AND 1.520 INCHES MAXIMUM |
| INTERNAL KEY QUANTITY | 1 |
| INTERNAL STRAIGHT KEY WIDTH | 0.156 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL THICKNESS | 0.500 INCHES MINIMUM AND 0.600 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4130 OVERALL |
| OUTSIDE DIAMETER | 2.060 INCHES NOMINAL |
| STYLE DESIGNATOR | KEY |
| SURFACE TREATMENT | CADMIUM OVERALL |