Receptacle cres astm a-582, type 303, cond b, passivated qq-p-35, spring cres qq-w-423, comp 302 cond b passivated, retaining ring beryllium copper qq-c-533, cadmium plated qq-p-416, type 2, class 2, thd 0.500-20 unf 3a 0.470 in. Lg, o/a lg 2.000 in.