Hilitchi 600-Pcs [7-Size] Internal Tooth Starlock Washers Assortment Kit, Quick Speed Locking Washers, Black Oxide Finish

Price: $16.98
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Product Features

???High Quality Internal Tooth Starlock Washers Kit ???Made of 65Mn Metal Steel, Anti-corrosion and Durable ???Set Includes 7 Most Used Sizes: M3 M4 M5 M6 M8 M10 M12? Please See Picture 2 for Specific Dimensional Size? ???Package Quantity: 600-Piece, All of Washers Will Be Packed in A Sturdy Transparent Plastic Case, Can Be Use for A Storage Box ???A Lock washer exerts a spring force between the fasteners head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to rotation.