Nominal Size: 1/2"
Thread: 20 TPI (Fine)
Width Across Flats: 3/4"
Height: 9/16"
Material: Steel
Finish: Zinc
Type: Castle Nut
Unslotted Thickness and Height of Flat: 13/32"
Box of 10.
A castle nut, also known as a slotted nut, is a nut with slots (notches) cut into one end. The bolt or axle has one or two holes drilled through its threaded end. The nut is torqued properly and then, if the slot isn't aligned with the hole in the fastener, the nut is rotated to the nearest slot. The nut is then secured with a cotter pin or safety wire.
