"SEMS" or Assemblies Type Screws have a single captive washer or multiple free spinning captive washers.
Double washer screws are common in the electronics industry but can be used in automotive, energy, agriculture, etc.
SAVE TIME SEMS Screws eliminate the assembly of individual components, reducing the loss of loose parts during assembly. Also compatible with automated production equipment.
A4 / 316 Stainless Steel fasteners are “marine grade” corrosion resistant; suitable for salt water applications. A4 fasteners also offer increased resistance to chemicals when compared with A2 stainless fasteners.
