The SC550BK-50 is a pack of 50 black #2 x 1/2" self-tapping screws. The Small Case Hardware list identifies them as the assembly screws for the 1552 series, and the black finish makes this the pack to choose when you are matching dark hardware on a 1552 enclosure rather than the standard SC550-50 version.

The long description reads "#2 X 1/2" PN SELFTAP BK", indicating a pan head, while the short description reads "#2 X 1/2" FH SELFTAP BK-50 PCS", indicating a flat head; compare against your original hardware if the head profile is critical. The self-tapping thread forms its own mating thread as it is driven, so no nut is required.

Each pack contains 50 screws. The package measures 2.5 in x 1.5 in x 0.75 in (64 mm x 38 mm x 19 mm) and has a shipping weight of 0.05 lbs (0.02 kg). The SC550BK-50 is RoHS compliant and REACH compliant.

Integrators and repair technicians use the SC550BK-50 to replace lost screws or to keep spares on hand, since enclosures in most cases already include all hardware needed for assembly. Hardware packs may not be compatible with every part in a listed series, so check the series landing page or the "Replacement Parts and Accessories" section on your enclosure's part page before ordering.