Used on gear reducer, part number sr-74-a aboard 420 ft wagb coast guard vessels. bore diameter 8.750 plus/minus .002; shaft diameter 7.250 plastic case surface treated
packing for use with high temp hydr oils, temp range is minus 65 deg f to plus 275 deg f; blue color code on outer periphery to identify rubber compound; used on M107, M110 cadmium retainer surface treated