The Standard Locknut HNL56 is a steel locknut designed for heavy-duty industrial applications, featuring a bore size of 38 mm and dimensions including an outer diameter of 280 mm and thickness of 10 mm. It weighs approximately 6.72 kg and is engineered for secure bearing mounting with a thread size of Tr280x4. The NTN KM40 locknut is a steel standard locknut with a 20 mm bore, 200 mm outer diameter, and 8 mm thickness, weighing 3.69 kg, suitable for precision bearing retention with M200x3 threading. The N-00 Series locknut offers inch-based dimensions with a major diameter of 0.391 inches, thickness of 0.073 inches, and mounting screw options for easy installation, ideal for smaller bearing assemblies. These locknuts provide reliable, durable fastening solutions for various shaft sizes and industrial machinery needs.