"MATERIAL SPEC QQ-A-225/6 ALLOY 2024-T351, WEDGE TAPER DOWN TO .160 RADUIS, BACKWARD LETTER C CUTOUT ON WIDE WIDTH END OF 0.500 IN. WITH .320 IN. RADUIS, 0.500 IN. DIA HOLE SPACED 1.34 ALONG LENGTH FROM WIDE WIDTH TO CENTER OF HOLE, FINISH COLOR CODE NO. 34424"