| APERTURE DIAMETER | 2.390 INCHES MINIMUM AND 2.410 INCHES MAXIMUM |
| BOLT CIRCLE HOLE QUANTITY | 8 |
| CROSS-SECTIONAL SHAPE STYLE | FLAT W/APERTURE |
| FLUTE QUANTITY | 8 |
| FLUTE RADIUS | 0.920 INCHES NOMINAL |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| OUTSIDE DIAMETER | 4.970 INCHES MINIMUM AND 5.030 INCHES MAXIMUM |
| OVERALL THICKNESS | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 4130 COND A OR N MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4130 OVERALL |
| MOUNTING BOLT CIRCLE DIAMETER | 4.125 INCHES NOMINAL |
| MOUNTING HOLE ARRANGEMENT STYLE | SINGLE BOLT HOLE CIRCLE |
| MOUNTING HOLE DIAMETER | 0.328 INCHES NOMINAL |
| MOUNTING HOLE TYPE | ROUND, UNTHREADED |
| SPECIAL FEATURES | MAGENTIC PARTICLE INSPECTED/ MAGNAFLUXED/PER MIL-I-6868 |
| SPECIFICATION/STANDARD DATA | 78286-66485-64207-101 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| STYLE DESIGNATOR | ROUND WITH FLUTES |
| SURFACE TREATMENT | CADMIUM OVERALL |