螺纹大径：Major Diam 　中径：Pitch diam 　底径：Minor diam 　通止规：Go/No go gage 　机械性能：mechanical and physical properties 　unified thread 统一英制螺纹 　Lustrate hydrogen after galvanizing to avoid hydrogen embrittlement 镀后去氢，防止氢脆 　Case carburization 表面渗碳 　With across flats 对边 　With across corners 对角 　Radius of fillet:头下圆角 　Transition thread length 过度螺纹 　Wrenching height 扳拧高度 　Rockwell 铬氏硬度 　Vickers 维氏硬度 　Brinell 布氏硬度 　Metallography microscope 金相显微镜 　Salt spray device 盐雾试验箱 　Tensile testing machine 拉力试验机 　Cold forming 冷打 　Hot forging 红镦 　P C 8 = property class 8 机械性能8级 　原材料：Raw material 　球化退火：Annealing 　冷拔：Drawing 　冷镦：Forming 　机加工：Machining 　螺纹成型：Roll Threading 　热处理：heat-treatment 　表面处理：finish 　去氢：Lustrating hydrogen 　检验：Inspection 　包装：Packing 　入库：Stocking 　车床：lathe 　磨制：grinding 　红打：hot forging 　冲压：punching