This is a genuine BMW fillister head screw, part number 51 24 8 166 982. The number stamped on the part is 51248166982; BMW's catalog files it under the short number 8166982. You will find it on our Interior Body shelf, under Other Body equipment parts.
It fits the E36 convertible (318i, 323i, 325i, 328i and M3, 1994–1999), with the M42, M43, M44, M50, M52 or S50 and other engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Electrical Folding Top Flap Mechanism (41_0016) and Manual Folding Top Flap Mechanism (41_0850). BMW's catalog calls for four of these at each place it is fitted. It weighs about 6 g (under 0.1 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.