These heavy-duty 5/8"-11 slotted hex nuts are designed for demanding fastening applications where secure locking is essential. The coarse thread pattern provides robust engagement, while the slotted design allows for additional locking mechanisms to prevent loosening in high-vibration environments. Each nut is precision-manufactured from high-strength steel with a plain finish, offering excellent durability and load-bearing capacity. The heavy hex pattern provides additional surface area for improved grip during installation and maintenance. This convenient 4-pack is perfect for construction, machinery assembly, and heavy equipment repair projects. The standard 5/8"-11 thread size is compatible with corresponding Grade 5 and Grade 8 bolts, making these nuts versatile for various industrial applications. The plain finish allows for additional surface treatments if needed for specific environmental conditions.