| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM | 
| HEAT TREATMENT | AS FABRICATED | 
| HOLE DIAMETER | 2.553 INCHES MINIMUM AND 2.573 INCHES MAXIMUM | 
| INTERNAL KEY QUANTITY | 2 | 
| INTERNAL STRAIGHT KEY WIDTH | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM | 
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729,COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | 
| MATERIAL THICKNESS | 0.070 INCHES MINIMUM AND 0.090 INCHES MAXIMUM | 
| MATERIAL | STEEL COMP 4130 OVERALL | 
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | 
| OUTSIDE DIAMETER | 3.240 INCHES MINIMUM AND 3.260 INCHES MAXIMUM | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| SURFACE TREATMENT | CADMIUM  AND CHROMATE OVERALL |