DS/EN ISO 898-5:2012 碳钢和合金钢制紧固件的机械性能 第5部分:规定硬度等级的紧定螺钉和类似螺纹紧固件 粗牙和细牙螺纹
Mechanical properties of fasteners made of carbon steel and alloy steel - Part 5: Set screws and similar threaded fasteners with specified hardness classes - Coarse thread and fine pitch thread