| APERTURE DIAMETER | 9.8 MILLIMETERS MINIMUM AND 10.2 MILLIMETERS MAXIMUM |
| APERTURE SHAPE | ROUND |
| OUTSIDE DIAMETER | 84.7 MILLIMETERS MINIMUM AND 85.3 MILLIMETERS MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A570 OR A572, GR 50 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A573, GR 70 ASSN STD 1ST MATERIAL RESPONSE |
| MATERIAL | STEEL |
| MOUNTING HOLE DIAMETER | 16.8 MILLIMETERS MINIMUM AND 17.2 MILLIMETERS MAXIMUM ALL HOLES |
| MOUNTING HOLE TYPE | UNTHREADED |
| MOUNTING HOLE QUANTITY | 3 |
| SHAPE | ROUND |
| RAISED SURFACE DIAMETER | 69.9 MILLIMETERS MINIMUM AND 70.0 MILLIMETERS MAXIMUM |
| RAISED SURFACE HEIGHT | 5.0 MILLIMETERS NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-46168 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-53039 MIL SPEC 1ST TREATMENT RESPONSE |
| SURFACE TREATMENT | PAINT POLYURETHANE |
| THICKNESS | 19.5 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM |