The 1550WMS100BK is a pack of 100 black M3.5 x 12mm screws, each fitted with an o-ring. The part page describes the pack as metric 1590 series replacement screws, black stainless steel with o-rings, and the hardware list classes it as watertight assembly screws for the 1590 series.

It is the black equivalent of 1550WMS100, suited to 1590 enclosure builds where the assembly screws should both carry o-rings and match a darker finish. The 100-count pack serves OEM production, integrators and maintenance teams alike.

• Quantity: 100 per pack
• Screw: M3.5 x 12mm with o-ring, black
• Type: watertight assembly screws
• Applicable series: 1590
• Packaging: shrink wrap

According to the manufacturer, enclosures in most cases already include the hardware needed for assembly, so this pack serves as replacement hardware. The manufacturer also warns that hardware packs may not be compatible with all parts in the listed series, and suggests checking the series landing page or the "Replacement Parts and Accessories" list for the specific enclosure.

The part page short description is "SS M3.5 Screw W Orings 100 PK", and the listed material is steel. 1550WMS100BK is classed as hardware, type screws, ships in shrink wrap at 0.22 lbs (0.10 kg), and is RoHS and REACH compliant.