Lock Washers 260/520Pcs M3-M12 Star Washer Push-on Locking Fasten Assortment Kit(520Pcs)

Installation Tip: Press the washer squarely onto the shaft with even pressure; for best results, use a press or a hammer with a flat drift to ensure all teeth engage fullyColor:BlackMaterial:High quality 65Mn Metal SteelSize:M3, M4, M5, M6, M8, M10, M12Package included:(260 or 520PCS, depends on you )260Pcs Internal Tooth Starlock Washers:50PCS M3, 50PCS M4, 40PCS M5, 40PCS M6, 30PCS M8,30PCS M10, 20PCS M12520Pcs Internal Tooth Starlock Washers:100PCS M3, 100PCS M4, 80PCS M5, 80PCS M6, 60PCS M8,60PCS M10, 40PCS M12Note:1. The item is small in size, please keep it away from kids.2.Please allow 1-3mm errors due to manual measurement.3.Due to light and screen setting difference, item's color may be slightly different from the pictures.

• nternal Teeth Grip: The sharp inward-pointing prongs dig into the shaft surface when compressed, creating positive mechanical lock that resists loosening from vibration and rotation
• Rigid Core: Formed from hardened steel that maintains its tooth geometry under high clamping force, preventing deformation and ensuring consistent grip through multiple install cycles
• Precision Fit: The uniform inner diameter provides consistent contact with standard shaft sizes, eliminating the play that can cause fasteners to work loose over time
• Bite Retention: The aggressive tooth profile embeds into softer shaft materials, providing reliable holding power even on smooth or lightly lubricated surfaces
• Reusable Hold: Unlike single-use fasteners, the washer can be removed and reinstalled while maintaining its grip, making it suitable for maintenance and adjustment tasks