This SAE Aerospace Standard (MA) establishes the diameter-pitch combinations of ISO metric 60° screw threads recommended for use in the aerospace industry for metric module shaft or bearing retaining screw threads.
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.
This procurement specification covers aircraft quality metric spanner nuts for retaining shaft mounted parts. Nuts are made from a corrosion and heat resistant age hardenable iron base alloy of the type identified under the Unified Numbering System at UNS S66286, and silver plated. Thread shear proof strength at room temperature is 450 MPa.
This procurement specification covers bolts and screws made from a corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07001. The following specification designations and their properties are covered: AS7471: 165 ksi minimum ultimate tensile strength at room temperature. 75 ksi stress-rupture strength at 1350 °F. AS7471-1: 165 ksi minimum ultimate tensile strength at room temperature. 99 ksi minimum ultimate shear strength at room temperature.