本规范规定了扳手型自锁螺母（即六角螺母、双六角螺母和花键驱动螺母）的要求，自锁螺母由UNS S66286统一编号系统中确定的耐腐蚀耐热钢制成。

This specification establishes the requirements for self-locking nuts, wrenching type (i.e., hexagon, double hexagon, and spline drive), made of a corrosion and heat resistant steel of the type identified under the Unified Numbering System as UNS S66286.