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Pawel,I recently bought 2 new screws for this purpose which were advertised as 5 x 16 but when I tried to fit them they were slightly to large a diameter thread and the slotted head looked to large to sit in the cup of the frame comfortably.I ended up using 4 x 16 chrome slotted which threaded in perfectly and the screw head sat nicely in the cup.Neither had the special rounded tip.