The 1590WMS100 is a 100-pack of watertight #6-32 x 1/2" stainless steel screws with o-rings for Hammond's imperial 1590 series enclosures. It is intended for engineers and integrators who seal 1590 or 1590K4 enclosures for use where moisture protection matters, and who need replacement fasteners that keep the sealed screw points intact.

Each screw is paired with an o-ring, and the series hardware list classifies the part as watertight assembly screws. The material is stainless steel, and the short description reads "1590 SS WATERTIGHT SCREW".

The part page lists an IP65 rating for this hardware. A pack contains 100 screws supplied in a bag, with a shipping weight of 0.17 lbs (0.08 kg). The 1590WMS100 is RoHS compliant and REACH compliant.

A black version with the same #6-32 x 1/2" stainless steel and o-ring description also appears in the series hardware list for builds that call for dark hardware. In most cases, enclosures include all hardware needed for assembly, so this pack is for replacements and spares. Hardware packs may not be compatible with all parts in the listed series; confirm the fit on the enclosure's replacement parts and accessories list.