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Slotted Hex Nuts

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Slotted nuts, similar in function to castle nuts, are internally threaded, hexagonal nuts with slots cut in the center of the flats.
Castle Nut, Plain (Inch)
Castle Nut, Plain (Inch)
Heavy Hex Slotted Nut, Plain (Inch)
Heavy Hex Slotted Nut, Plain (Inch)
Hex Slotted Nut, Plain (Inch)
Hex Slotted Nut, Plain (Inch)
Hex Slotted Nut, Zinc (Inch)
Hex Slotted Nut, Zinc (Inch)

The slots accommodate a cotter pin or safety wire when installed with a drilled fastener.

A castle nut, also called a castellated nut, or slotted nut, is a nut with slots (notches) cut into one end. The name comes from the nut looking like a medieval castle. The bolt or axle has one or two holes drilled through its threaded end.
 



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