The Standard Locknut HNL56 is a heavy-duty steel locknut designed for industrial bearing applications, featuring a bore size of approximately 280 mm and an outside diameter near 330 mm, with a thickness of about 10 mm and a weight of 14.8 lb. It supports shaft sizes up to 50 inches and is engineered for high durability in mission-critical environments. The NTN KM40 locknut offers a steel construction with a bore diameter of 200 mm, an outside diameter of 250 mm, and a thickness close to 8 mm, weighing 8.1 lb, suitable for secure bearing mounting with M200x3 thread specifications. The C-Standard Locknut from Applied features inch-based dimensions, with sizes ranging from 0.39 to over 2 inches in bore diameter, designed for easy installation with mounting screws, providing secure locking and precise fit for various bearing housings. These locknuts combine robust steel construction, precise threading, and dimensional accuracy to ensure reliable bearing retention in heavy industrial machinery.