美利体育登录入口官网:DS/ISO 965-4:1999
ISO 通用公制螺纹 公差 第4部分:热浸镀锌外螺纹与镀锌后公差位置为 H 或 G 的内螺纹配合的尺寸极限
ISO general purpose metric screw threads - Tolerances - Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing