本规范涵盖了紧密缠绕的螺旋线圈、螺纹嵌件，其由耐腐蚀型钢制成，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，可由嵌件制造商形成，以达到本采购规范的要求。插入线圈的内表面在组装成螺纹螺纹孔后，提供标准60度统一形式的内螺纹。

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 degrees Unified form.