3.994" outside diameter eliptical aperture; two 0.0930 in. dia centered on hokiz cl; four 0.060-80 unf threaded holes, two ea 1.885 in. above paint aperture surface treated round
1.651" outside diameter 40 thread quantity per inch single mounting hole on backface appendage; material spec B12H30c, fscm 30221; alodize per F65e CD3-2, fscm 30221 round unc thread series
one 0.156 in. dia min to 0.160 in. dia max blind hole in outer face, 0.190 in. dp, countersunk 0.187 in. diy by 100.0 deg, w/one MS16562 tubular pin spring inserted, located 0.812 in. below horiz cl chromate bore surface treated square