| DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 1.921 INCHES MINIMUM AND 1.941 INCHES MAXIMUM |
| EXTERNAL KEY QUANTITY | 4 |
| EXTERNAL STRAIGHT KEY WIDTH | 0.150 INCHES MINIMUM AND 0.170 INCHES MAXIMUM |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| HOLE DIAMETER | 4.152 INCHES MINIMUM AND 4.172 INCHES MAXIMUM |
| INTERNAL STRAIGHT KEY WIDTH | 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM |
| INTERNAL KEY QUANTITY | 2 |
| OUTSIDE DIAMETER | 4.637 INCHES MINIMUM AND 4.657 INCHES MAXIMUM |
| OVERALL DISTANCE INCLUDING KEYS | 4.833 INCHES MINIMUM AND 4.853 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL THICKNESS | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4130 OVERALL |
| SPECIAL FEATURES | INTERNAL KEYS 180 DEG APART OFFSET 10 DEG 56 MIN 45 SEC FROM CENTER LINE OF EXTERNAL KEYS |
| STYLE DESIGNATOR | KEY |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-16232,TYPE Z,CLASS A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |