M3 M4 M5 M6 M8 M10 M12 (with box) black 340 pieces <ul class="a-un0rdered-list a-vertical a-spacing-mini"> <li class="a-spacing-mini"><span class="a-list-item">7 sizes, total 340 pieces: 340 pieces internal tooth star lock washers, 7 sizes: M3 x 9mm, M4 x 12mm, M5 x 12mm, M6 x 14mm, M8 x 18mm, M10 x 20mm, M12 x 25mm, enough to meet your daily needs. </span></li> <li class="a-spacing-mini"><span class="a-list-item">Sturdy and durable: star lock washers are made of high-quality 65 manganese steel, black oxide coating can prevent oxidation and aging, with good corrosion resistance and high temperature performance. </span></li> <li class="a-spacing-mini"><span class="a-list-item">Excellent Locking Function: Lock washers exert spring force between the fastener head and the base material, generating more friction and anti-rotation force, which is very suitable for quick repairs and restorations. </span></li> <li class="a-spacing-mini"><span class="a-list-item">Wide Application: Widely used in vibration reduction and insulation of machinery, furniture, appliances, electronic equipment, automobiles, sports equipment and industrial production. </span></li> <li class="a-spacing-mini"><span class="a-list-item">Portable Tool: All star washers are stored in a clear plastic assortment box with a specification chart, so you can quickly find what you need, easy to identify and store. </span></li> <li class="a-spacing-mini"></li> </ul>