7material, steel, qq-s-633, fs 1010 through fs 1020, finish, cadmium plate, qq-p-416, type 1, class b or zinc plate, 57-0-2c, type 1, class ls, dim., 1.750 in. Dia, 1.560 in. H, 4 holes equally spaced around dia, 0.139 in. Min, 1.141 in. Max hole diaagavg2350008285000