These are replacement black screws that Roland used in various vintage synths including the Jupiter 8, Jupiter 6, VP330, RS-505, SH2/9 and many others.
These are very hard to find in black, and we recently received a large shipment of them.
These are M3 threaded, truss head (wide, mushroom, etc) screws.
The originals are JIS head, which is a much narrower phillips drive. These are normal phillips. We recommend changing all of them in the vicinity for a uniform appearance.