Double

A machine screw and free-spinning lock-washer manufactured as one assembly. Steel SEMS are available with the following types of washers: internal tooth, external tooth, split-lock washer, and square cone. Stainless SEMS are offered with external tooth lock washers.



Clearance pricing is limited to current inventory in-stock. No backorders will be accepted at clearance price. Call 1-866-501-9504 for a quote.