1、螺纹大径：Major Diam螺纹 中径：Pitch diam螺纹 底径：Minor diam通止规：Go/No go gage机械性能：mechanical and physical propertiesunified 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 th
2、read 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 Threadin
3、g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：punchingDiameter 直径Length 长度1 标准GB （国标）ISO(国际标准)DIN （德制）JIS （日标）ANSI /ASME （美标）BA （英制）2 螺纹M. MF (公制牙 )UNC.UNF (美制牙)BSW.BSF (英制牙)3 海关编码73181500 螺栓73181600 螺帽73182100 垫圈BO=black oxide 氧化发黑IHH=ind hex head 锯 六角头PH=phillips 十字槽sw/fw=split washer/flatwasher 弹垫 平垫kep nut 锁紧螺母cementation 渗碳acorn nut 盖形螺母
