This specification establishes the requirements for the following types of self locking nuts: wrenching nuts, i.e., hex, double hex, spline drive; and 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. Primarily for use in aerospace propulsion systems to temperatures up to 425~C for anchor nuts and shear height wrenching nuts formed from sheet. Nuts are used with bolts capable of developing 1100 MPa tensile strength at room temperature and having MJ threads to MA 1370.
