Hex Castle Nuts or Castellated Nuts have notches on one end, which resemble the serrated tops of castle parapets. These nuts are used with a bolt with cross-drilled holes, so that a cotter pin can pass through the nut and into a hole in a bolt shank, thus preventing the nut from loosening. The notched end is turned down slightly, allowing the cotter pin to be bent around the nut. Often used in machinery, shafts and automotive applications.
Castellated Nuts Diameters
Castellated Nuts are available on the FCH Network with Imperial/US diameters that range from #1 to 6 and with Metric diameters that range from M4 to M80. The length of Castellated Nuts is usually measured from the point to the underside of the head.
Castellated Nuts are available on the FCH Network in materials that range from Steel to Brass
Castellated Nuts Finishes
Castellated Nuts are available on the FCH Network in finishes or coatings that range from Plain to Phosphate