| DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 0.195 INCHES NOMINAL |
| HARDNESS RATING | 20.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM |
| HEAT TREATMENT | AS FABRICATED |
| HOLE DIAMETER | 0.503 INCHES MINIMUM AND 0.508 INCHES MAXIMUM |
| INTERNAL KEY QUANTITY | 2 |
| INTERNAL STRAIGHT KEY WIDTH | 0.115 INCHES MINIMUM AND 0.120 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| MATERIAL THICKNESS | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4135 OVERALL |
| OUTSIDE DIAMETER | 0.858 INCHES MINIMUM AND 0.873 INCHES MAXIMUM |
| STYLE DESIGNATOR | KEY |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | OXIDE FILM OVERALL |