To improve the integrity and strength of assemblies, washers are often used along with screws. It was a great leap forward when screws and washers became pre-assembled into the SEMS screw. This screw includes a free-spinning washer that is locked into place because the screw thread (created after the washer is put on) is larger than the hole of the washer. SEMS are low cost, easy to use and are available from our company in many different sizes, styles, head types, drives, materials and other choices, depending upon your application needs.
SEMS are more than a convenience; they are ingenious, time-and-labor-saving devices that have revolutionized assembly manufacturing processes.
The Double Washer SEMS is a fastener with two free-spinning washers. At SEMS and SPECIALS, we offer them in standard and metric sizes. We also manufacture other double washer combination SEMS for your specific application needs.
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