Scres, cres ams 5737 type a286, collar and spring, cres mil-s-7720, passivated finish, 8-32 unc 2a by 0.310 in. Lg thd, 0.437 in. Lg fastener from largest collar bearing surface, swaging shoulder 0.062 in. Lg by 0.249 in. Dia, fillister head w/scres driver slot