| APERTURE LENGTH | 18.120 INCHES NOMINAL |
| APERTURE WIDTH | 10.620 INCHES NOMINAL |
| BOLT HOLE QUANTITY | 20 |
| CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH | 2.875 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED |
| CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH | 3.166 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED |
| CROSS-SECTIONAL SHAPE STYLE | SOLID SINGLE OR COMPOSITION |
| CROSS-SECTIONAL THICKNESS | 0.054 INCHES MINIMUM AND 0.074 INCHES MAXIMUM |
| HOLE DIAMETER | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED |
| INSIDE CORNER RADIUS | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG WIDTH | 0.270 INCHES MINIMUM AND 0.330 INCHES MAXIMUM |
| OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH | 0.270 INCHES MINIMUM AND 0.330 INCHES MAXIMUM |
| OVERALL LENGTH | 19.590 INCHES MINIMUM AND 19.650 INCHES MAXIMUM |
| OVERALL WIDTH | 12.090 INCHES MINIMUM AND 12.150 INCHES MAXIMUM |
| MATERIAL | ASBESTOS OVERALL |
| STYLE DESIGNATOR | NON-CIRCULAR |