Best Metric Lock Nuts of 2025

The Glarks Lock Nut Assortment includes high-quality nylon insert lock nuts made from superior 304 stainless steel, ensuring strength and durability. With a total of 175 pieces in seven different sizes (M3, M4, M5, M6, M8, M10, M12), this kit is versatile for various applications. The nylon washer enhances friction with the mating threads, preventing loosening and providing better locking ability. This feature is particularly useful for anyone looking to secure components in automobiles, construction machinery, and shipbuilding.

The Zxglxinyao Lock Nuts are crafted from high-quality stainless steel, ensuring durability and resistance to corrosion and rust. Their smooth surface and edges prevent deformation, providing reliability in harsh conditions. The practical design allows you to replace lock washers effectively, keeping bolts secure and reducing the risk of them loosening under vibration. Additionally, these nuts are stored in a transparent box with compartments, making it easy for you to find the right size quickly. This organised storage solution enhances convenience for both professionals and DIY enthusiasts.

The Glarks Hex Lock Nuts kit includes 179 pieces in various Metric and SAE sizes, making it easy for you to find the right nut for your project. The high-quality 304 stainless steel construction ensures durability and resistance to rust and corrosion, which is essential for long-lasting use. Each nut features a nylon insert collar that helps prevent loosening due to vibration, providing peace of mind while working on your projects. Additionally, the transparent storage box keeps everything organised, allowing for quick size selection when you need it most.

The Swpeet Lock Nut Kit includes a versatile assortment of 250 pieces of advanced stainless steel nylon locking nuts in seven common sizes. These high-quality nuts are designed to replace traditional locking washers, offering better safety and a firm grip. Their robust anti-rotation feature ensures that they remain secure even under vibration and torque. Additionally, the kit comes in a durable plastic box, making it easy for you to organise and access your locking nuts without hassle.

The But the cow Hex Nuts offer exceptional quality with their high-strength carbon steel construction, ensuring durability and resistance to rust. These assorted nuts are designed to work seamlessly with bolts and screws, providing a secure fastening to prevent loosening. They come neatly organised in a transparent storage box, making it easy for you to find the right size quickly. This product is versatile, suitable for various applications, from machinery to DIY projects, making it an essential addition to your toolkit.

The EEEEE Lock Nuts offer a comprehensive assortment of 524 pieces in various metric sizes, including M2 to M12. This means you will have just the right size for your projects, ensuring a secure fit. Made from durable 304 stainless steel, these nuts provide excellent resistance to corrosion, ideal for outdoor or moisture-prone applications. The nylon insert feature enhances grip, preventing loosening over time, which is especially useful in high-vibration environments. With individual compartments in a transparent case, you can easily find the size you need without hassle.

The Othmro Locknuts Set features five sizes - M3, M4, M5, M6, and M8 - making it ideal for a variety of applications. Crafted from premium 304 stainless steel, these lock nuts offer excellent durability and resistance to corrosion, ensuring they last through multiple uses. The self-locking nylon insert securely fits against fasteners, giving you peace of mind that they won’t loosen during operation. With 300 pieces included, you have plenty of nuts for your projects, whether you're a DIY enthusiast or a professional tradesperson.

The qxayxa Lock Nut Assortment is designed with high-quality carbon steel, ensuring durability and resistance to corrosion. The nylon inserts enhance friction, preventing loosening due to vibrations, which provides peace of mind in your projects. Its practical hexagon design keeps screws securely in place, reducing the risk of accidental dislodgement. This assortment is versatile, suitable for various applications ranging from electrical appliances to vehicles, making it an ideal choice for both professionals and DIY enthusiasts.

The LEONTOOL Lock Nuts Assortment includes 150 pieces of metric nylon insert hex lock nuts in various sizes, ensuring you have the right fit for your projects. The nylon insert design provides a secure grip, helping to prevent loosening due to vibrations, making them ideal for dynamic environments. With a sturdy 304 stainless steel construction, these lock nuts resist rust and corrosion, ensuring durability. The included storage box allows for organised and easy access, so you won't misplace your nuts during use.

The POWCOG Lock Nuts are crafted from high-quality A2 stainless steel, specifically Grade 304, ensuring exceptional resistance to loosening under pressure. They also boast excellent corrosion resistance, making them ideal for use in varied environments, whether exposed to moisture or chemicals. You will appreciate their ability to withstand both low and high temperatures, ensuring performance in extreme conditions. With a thread diameter of 4mm and a spanner size of 7mm, these nuts are designed for convenient installation and reliable fastening in your projects.