Castle nuts feature slots around the top that align with a drilled hole in the bolt or shaft, allowing a cotter pin to lock the nut securely in place.
Nominal Size: M8
Thread: 1.0mm Pitch (Fine)
Width Across Flats: 13mm
Height: 9.3mm
Across-Corners Size: 15mm
Material: Steel
Finish: Yellow Zinc
Hardness: Class 8
Type: Castle Nut
Specifications: DIN 935
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.
