SEMS Machine Screws

SEMS screws come pre-assembled with a free spinning lock washer that is held in place permanently by the major diameter of the screws thread. This eliminates the need of hand assembling washers onto the screw saving you time, resources, and the potential for lost or dropped washers in the production line. SEMS screws are used in applications where loosening is a concern. Unit of Measure: M = 1000 For example: For 1,000 pcs enter 1.000; For 10,000 pcs enter 10.000; For 100,000 pcs enter 100.000