Features: 100% brand new and high quality. Made of premium material, these lock nuts are sturdy and durable. They can prevent vibration from loosening a bolted joint, resist loosening under vibrations to provide a locking action. These lock nuts are amazing replacement for normal nuts of hardware, vehicles, home or outside applications. Simple and fast to use, convenient to tighten or loosen. Specification: Standard code: GB6184 Strength class: class 8.8 Surface finishing: Zinc plating Thread type: Fine thread Quantity: 20pcs Type(Optional) M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 Width 7mm / 0.3in 8mm / 0.3in 10mm / 0.4in 16mm / 0.6in 16mm / 0.6in 18mm / 0.7in 21mm / 0.8in 25mm / 1in 29mm / 1.1in 35mm / 1.4in Height 4.3mm / 0.2in 5mm / 0.2in 5.5mm / 0.2in 6.2mm / 0.2in 8.3mm / 0.3in 10.3mm / 0.4in ---- 15.5mm / 0.6in 17.5mm / 0.7in 25mm / 1in Package list: 20 * Lock Nuts Note: "----" means no data. 1、100% brand new and high quality. 2、Made of premium material, these lock nuts are sturdy and durable. 3、They can prevent vibration from loosening a bolted joint, resist loosening under vibrations to provide a locking action. 4、These lock nuts are amazing replacement for normal nuts of hardware, vehicles, home or outside applications. 5、Simple and fast to use, convenient to tighten or loosen.