a load beam is mounted in a head stack assembly without staking operations by mounting a mounting plate having an annular boss and carrying the load beam to an actuator arm having a circular opening by having the plate annular boss larger than the circular opening and providing for interfittment by having a split ring structure including a slot of an original width on the annular boss or the circular opening that deflects during mounting and thereafter resiliently retains the plate and arm together by the tendency of the slot to return to its original width .