本规范涵盖紧密缠绕的螺旋线圈、由耐腐蚀钢丝制成的螺纹嵌件，其化学成分符合 表1 并在统一编号系统下标识为UNS S30200或UNS S30400，可由刀片制造商形成以满足本采购规范的要求。在组装到螺纹螺纹孔中之后，插入线圈的内表面提供标准60°统一形式的内螺纹。

This specification covers closely-wound helical coil, screw thread inserts made of a corrosion resistant steel formed wire with a chemical composition in accordance with Table 1 and identified under the Unified Numbering System as UNS S30200 or UNS S30400 that can be formed by an insert manufacturer to achieve the requirements of this procurement specification. The inner surface of the insert coil, after assembly into a screw thread tapped hole, provides internal threads of standard 60° Unified form.