This specification establishes the requirements for the following types of self locking nuts: a Wrenching nuts: i.e., hex, double hex, spline drive. b Anchor nuts: i.e., plate nuts, gang channel nuts, shank (clinch) nuts. The wrenching nuts, shank nuts, and nut elements of plate and gang channel nuts are made of corrosion and heat resistant steel of the type identified under the Unified Numbering System as UNS S66286.