The 1593ATS50 is a 50-pack of #4 x 1/4" self-tapping PC board screws for Hammond plastic enclosures. It is sized for designers, prototype shops and repair technicians who need a modest quantity of the short screws that secure circuit boards to enclosure mounting bosses.

The manufacturer describes the part as PC board screws for 1593, 1599 and 1591XX enclosures. The series hardware list extends the applicable series to 1553, 1553T, 1591XX, 1593, 1599TAB, 1599RFI, 1599T and 1599, and classifies the part as PCB screws.

The screws are steel and are supplied in a bag. Each pack contains 50 screws and has a shipping weight of 0.06 lbs (0.03 kg). The 1593ATS50 is RoHS compliant and REACH compliant.

For higher-volume work, the hardware list also includes a 100-pack of the same #4 x 1/4" self-tapping PCB screw. In most cases, enclosures include all hardware needed for assembly, so this pack is intended for replacements and additional boards. Hardware packs may not be compatible with all parts in the listed series; check the enclosure's replacement parts and accessories list to confirm fit.