| DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM |
| HOLE DIAMETER | 0.319 INCHES MINIMUM AND 0.329 INCHES MAXIMUM |
| INTERNAL STRAIGHT KEY WIDTH | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL |
| OUTSIDE DIAMETER | 0.500 INCHES MINIMUM AND 0.520 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |