Type This specification establishes the requirements for the following types of self-locking nuts: a. Wrenching nuts: that is@ hex@ double hex@ spline drive b. Anchor nuts: that is@ plate nuts@ gang channel nuts@ shank nuts The wrenching nuts and shank nuts are made of low alloy steels@ and the nut elements of plate and gang channel nuts are made of carbon steels or low alloy steels and having MJ threads to ISO 5855/2. Nuts have 1100 MPa tensile strength class at room temperature. Maximum test temperature of parts at 235?? Application Primarily for use in aerospace propulsion systems.