High Quality Internal Tooth Starlock Washers Kit,All contained in a sturdy and transparent plastic box, can be use for a storage box.
Made of 65Mn Metal Steel, Anti-corrosion and Durable.
Used in machinery equipment, industrial production of shock absorption and insulation, can meet your different needs in daily life.
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.
Packing Quantity:7 sizes metric,M3 x 9mm(50pcs), M4 x 12mm(50pcs), M5 x 12mm(50pcs), M6 x 14mm(40pcs), M8 x 18mm(40pcs), M10 x 20mm(30pcs), M12 x 25mm(20pcs).Total 280pcs.