NF EN ISO 898-1:2013
碳钢和合金钢紧固件的机械性能 - 第 1 部分：规定质量等级的螺钉、螺柱和螺纹杆 - 粗牙螺纹和细牙螺纹
Mechanical characteristics of carbon steel and alloy steel fasteners - Part 1: screws, studs and threaded rods of specified quality classes - Coarse pitch threads and fine pitch threads