"ITEM CONSIST OF FLANGE P/N316620-1,GENERAL SHAPE IS CIRCULAR WITH FLAT AREA 1.688IN. FROM CENTER ON ONE SIDE,CONTAINS 3 SLOTS ALONG CIRCUMFERANCE SPACED AT 90DEGREE INTERVALS,PROCESSED WITH CHEMICAL FILM PER MIL-C-5541,CLASS 3/F-21,METHOD 5,ENAMEL PER F-157,METHOD 1,TYPE 3,COLOR NO.37038"