The SC509-50 is a package of 50 replacement screws: #4 x 3/8" stainless steel self-tapping screws listed as the assembly screws for the 1551W series enclosure. It is intended for installers, maintenance crews and product builders who need to restore or replace the fasteners holding a 1551W case together.

The manufacturer's short description identifies the screw as a "#4x3/8 Plastite SS", and the series hardware list describes it as a #4 x 3/8" stainless steel self-tap screw. The self-tapping thread cuts its own path, so no separate nut or insert is needed during reassembly, and stainless steel construction is specified for this part.

Each pack contains 50 pieces in a package measuring 2.5 in x 1.5 in x 0.75 in (64 mm x 38 mm x 19 mm), with a shipping weight of 0.05 lbs (0.02 kg). The SC509-50 is RoHS compliant and REACH compliant.

Enclosures normally include all of their assembly hardware, so this is a replacement or spares pack. The manufacturer cautions that hardware packs may not be compatible with every part in a listed series; confirm fit using the series landing page or the "Replacement Parts and Accessories" list on your enclosure's part page before ordering the SC509-50.