General description Lock nuts, also known as stop nuts, are essential components used to securely attach to a bolt when mechanically joining materials. They feature a hexagonal design that provides uniform strength, ensuring a tight combination that is firm and stable, thus saving installation time. The nylon insert at the top of the nut prevents shrinkage or loosening due to vibration, making them ideal for various applications. Technical specifications Material: Stainless Steel, Nylon Color: Silver Category: M4 Pitch: 4mm Width Hex: 7mm / 0.28" Height: 5mm / 0.2" Scope of supply: 100 pieces M4 Lock Nut Other information Please allow slight error in the dimensions due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Not suitable for children under 3 years old.