本采购规范涵盖具有均匀矩形横截面的螺旋缠绕式飞机质量扣环，该扣环由耐腐蚀奥氏体铁基合金制成，该合金的类型根据统一编号系统UNS S30200确定，并具有弹簧回火条件。

This procurement specification covers aircraft quality retaining rings of the spiral wound type with uniform rectangular cross-sections and made from a corrosion resistant austenitic iron base alloy of the type identified under the Unified Numbering System as UNS S30200, and of spring temper condition.