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
ISO通用米制螺纹公差第4部分:镀锌后与公差位置为H或G的内螺纹配合的热浸镀锌外螺纹的尺寸限制