2350010589487,2350007568497 end item identification, steel,alloy condition annealed,comp 8640,4140h,spec astm a519,protective finish silver plate,6.995 in. m 7.005 in. p outer dia,6.500 in. dia,6.377 in. m 6.382 in. p inner dia,0.264 in. m 0.267 in. p w,0.203 in. l,0.312 in. w 16 places equally spaced,heat treatment quench and temper to rockwell c32 min general characteristics item description