"FIBER GLASS CLOTH NO. 181,AND RESIN,MIL-R-7575,FLANGE DIA 7.900 IN.,PAN DIA 6.160 IN.,DEPTH 2.430 IN.,AN815-6D BONDED INTO DRAIN PORT,4.060IN. DIA HOLE IN PAN BOTTOM,9 MS21060L3 NUT PLATES ON FLANGE ON 7.100 IN.BCD,12 0.265 IN. MIN,0.270 IN. MAX DIA HOLES IN PAN BOTTOM ON 4.750 IN. BCD"