Rufus Stone wrote:

Looking for a number of M3 Black Pan Head (crosshead) screws, about
4mm long. These are to replace (beautify) an old piece of
communications equipment which has 'chewed up' heads.

rswww.com offers partnum 483-0934, M3 x 6mm long, a snip at 1.30 squid
the hundred. That's the shortest they do. www.farnell.co.uk might well
do the same.

HTH - Stefek