DIN EN ISO 898-1:2013-05
碳钢和合金钢紧固件的机械性能 第1部分:具有规定性能等级的螺栓、螺钉和螺柱 粗牙螺纹和细牙螺纹
Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1:2013); German version EN ISO 898-1:2013