| DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | 1.428 INCHES MINIMUM AND 1.448 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 | 3.167 INCHES MINIMUM AND 3.187 INCHES MAXIMUM |
| INTERNAL STRAIGHT KEY WIDTH | 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM |
| INTERNAL KEY QUANTITY | 2 |
| OUTSIDE DIAMETER | 3.690 INCHES MINIMUM AND 3.710 INCHES MAXIMUM |
| OVERALL DISTANCE INCLUDING KEYS | 3.858 INCHES MINIMUM AND 3.878 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 13 DEG 3 MIN 52 SEC FROM CENTER LINE OF EXTERNAL KEYS |
| STYLE DESIGNATOR | KEY |
| SURFACE FINISH | 63.0 MICROINCHES TOP |
| SURFACE FINISH | 63.0 MICROINCHES BOTTOM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-P-16232,TYPE Z,CLASS A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |