"MATL STEEL 4130 CLASS D; FINISH HEAT CURED CORROSION INHIBITING,HEAT TREAT ROCKWELL C SALE 25-30; 2 HOLES 0.880 IN. RADIUS; 1 HOLE 0.750 IN. RADIUS; 2 HOLES 0.265 IN. DRILL; 0.732 IN. NOM HOLE DIA; 0.750 IN. NOM HOLE DIA; 0.515 IN. NOM HOLE DIA; USED ON CARGO RAMP"