Fillister head screw — a genuine BMW part, number 51 23 7 203 737. The number stamped on the part is 51237203737; BMW's catalog files it under the short number 7203737. You will find it on our Interior Body shelf, under Other Body equipment parts. It supersedes the older number 8227680, so a part carrying that number is the same part.
It fits every E46 body style (320i, 323i and 325i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 3 diagrams, among them Engine Hood/Mounting Parts (41_1099) and Engine Hood/Mounting Parts (41_1290). BMW's catalog calls for four of these at each place it is fitted. It weighs about 20 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.