Socket head flage screw used to hold cutting disk bearing assembly onto cutting motor. Used on 310, 315, 315X, 430X, 430XH, 435X, 450X, 450XH, 520, 520H, 535AWD, 550, 550H, 450X EPOS, 450XH EPOS, 550 EPOS, 550H EPOS models of Husqvarna Automowers.