The 1593ATS100 is a 100-pack of #4 x 1/4" self-tapping PCB screws for Hammond plastic enclosures. It is intended for production assemblers and OEM engineers who mount circuit boards in enclosures regularly and want a larger supply of the short board-mounting screws.

The short description reads "PCB SCREWS FOR 1591,1593,1599". The series hardware list names eight applicable series: 1553, 1553T, 1591XX, 1593, 1599TAB, 1599RFI, 1599T and 1599, and classifies the part as PCB screws.

Each pack contains 100 screws with a shipping weight of 0.1 lbs (0.05 kg), so a single pack covers many board installations. The 1593ATS100 is RoHS compliant and REACH compliant, which supports builds that must meet those material-restriction requirements.

A smaller 50-pack of the same #4 x 1/4" screw is also listed for lighter use. In most cases, enclosures include all hardware needed for assembly, so this pack is for replacements, additional boards and production stock. Hardware packs may not be compatible with all parts in the listed series. Check the specific enclosure's replacement parts and accessories list before ordering to make sure these PCB screws suit your enclosure.