| APERTURE DIAMETER | 0.812 INCHES NOMINAL |
| BOLT CIRCLE HOLE QUANTITY | 6 |
| COUNTERBORE DEPTH | 0.125 INCHES NOMINAL |
| COUNTERBORE DIAMETER | 0.438 INCHES NOMINAL |
| CROSS-SECTIONAL SHAPE STYLE | RAISED SURFACE W/ APERTURE |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| OUTSIDE DIAMETER | 2.156 INCHES NOMINAL |
| OUTSIDE RAISED SURFACE DIAMETER | 1.123 INCHES MINIMUM AND 1.124 INCHES MAXIMUM |
| OVERALL THICKNESS | 0.562 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A304-79 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OVERALL |
| MOUNTING BOLT CIRCLE DIAMETER | 1.625 INCHES NOMINAL |
| MOUNTING HOLE ARRANGEMENT STYLE | SINGLE BOLT HOLE CIRCLE |
| MOUNTING HOLE DIAMETER | 0.281 INCHES NOMINAL |
| MOUNTING HOLE TYPE | ROUND, UNTHREADED, COUNTERBORED |
| RAISED SURFACE HEIGHT | 0.156 INCHES NOMINAL |
| STYLE DESIGNATOR | ROUND |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DOD-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE MANGANESE OVERALL |