This 40-pack of M10 x 1.5 mm nylon insert hex lock nuts is designed for secure fastening in automotive, machinery, and furniture assembly projects. Constructed from durable 304 stainless steel, these metric hex nuts offer enhanced corrosion and rust resistance for reliable performance in indoor and outdoor environments. The integrated nylon collar creates friction against bolt threads to help prevent loosening caused by persistent shock and vibration. These self-locking nuts are engineered to maintain a stable fit and consistent assembly torque, making them an ideal choice for high-vibration applications where safety is a priority. This assortment kit comes organized in a reusable transparent storage case for quick identification and convenient access during DIY repairs or professional maintenance tasks. Upgrade your hardware collection with these dependable stainless steel locknuts designed to support long-lasting, secure connections.