Fasteners - Technical specifications - Part 31: Metric thread rolling screws of property class 10.9 with additionally hardened thread forming zone
紧固件.技术规范.第31部分:具有额外硬化螺纹形成区的性能等级为10.9的公制螺纹滚动螺钉
2020-02-01
JB/T 10232.2-2015
成套螺纹工具 第2部分:技术条件
Complete set thread tool - Part 2:Technical specifications