An assortment of SAE fine-threaded hex castle nut variants from The Hillman Group. Castle nuts are often used with cotter pins to attach wheels to spindles. The slots accommodate the cotter pin when used with a drill shank. Variants included in this assortment range from 1/4"-28 to 7/8"-14 in fine thread size. Full assortments of #46197 contain nine (9) refills comprised of Hillman item numbers #798 - #802, #46198, #46199, #397735, and #397738.