【Premium Anti-Loosening Performance】5/16"-18 standard coarse thread nylon insert locknuts provide reliable vibration resistance, ensuring a tight fit even under shock or movement. The nylon insert creates strong friction to prevent loosening, ideal for machinery, automotive, and industrial applications. 【High-Quality 304 Stainless Steel】Made of durable 304 (A2-70) stainless steel, these lock nuts are rustproof, corrosion-resistant, and reusable. Precision-polished for a smooth surface, they won’t deform, twist, or scratch hands during installation. 【Wide Industrial & DIY Applications】Perfect for furniture assembly, automotive repairs, machinery, construction, and workshop projects. Suitable for high-vibration environments, ensuring long-term stability for equipment and structures. 【Convenient Storage & Easy to Use】Includes 70 pcs of 5/16"-18 locknuts in a well-organized package. Easy to install with standard wrenches, offering strong tightening force for secure fastening. 【Durable & Long-Lasting Fastening Solution】Engineered for repeated use, these lock nuts maintain their grip and structural integrity even after multiple installations. The high-grade 304 stainless steel ensures long-term durability, while the nylon insert stays effective through vibration and wear, providing a cost-effective, reusable fastening solution for professional and DIY projects. 【Premium Anti-Loosening Performance】5/16"-18 standard coarse thread nylon insert locknuts provide reliable vibration resistance, ensuring a tight fit even under shock or movement. The nylon insert creates strong friction to prevent loosening, ideal for machinery, automotive, and industrial applications. 【High-Quality 304 Stainless Steel】Made of durable 304 (A2-70) stainless steel, these lock nuts are rustproof, corrosion-resistant, and reusable. Precision-polished for a smooth surface, they won’t deform, twist, or scratch hands during installation. 【Wide Industrial & DIY Applications】Perfect for furniture assembly, automotive repairs, machinery, construction, and workshop projects. Suitable for high-vibration environments, ensuring long-term stability for equipment and structures. 【Convenient Storage & Easy to Use】Includes 70 pcs 5/16"-18 locknuts in a well-organized package. Easy to install with standard wrenches, offering strong tightening force for secure fastening. 【Durable & Long-Lasting Fastening Solution】Engineered for repeated use, these lock nuts maintain their grip and structural integrity even after multiple installations. The high-grade 304 stainless steel ensures long-term durability, while the nylon insert stays effective through vibration and wear, providing a cost-effective, reusable fastening solution for professional and DIY projects.