标准螺纹代号列表1

标准螺纹代号列表 螺纹代号 Thread symbol 螺纹 Thread 参考标准 Reference Standard 牙型角 Thread Angle M 公制螺纹 粗牙系列 Coarse series ISO68,GB196 60° Metric screw threads 细牙系列 Fine series ISO724,GB196 S 小螺纹 Miniature screw threads ISO1501, GB/T15054 UNC 统一螺纹 Unified threads 粗牙系列 Coarse series ANSI B 1.1 UNF 细牙系列 Fine series UNEF 特细牙系列 Extra-Fine series UNS 特殊直径、螺距、衔接长度 系列 Special diameter\pitch length of engagmentand UN 等螺距系列 Constant-pitch series Tr 公制梯形螺纹 Metric trapezoidal screw threads ISO2904, GB5796 30° TM 30梯形螺纹 30trapezoidalscrew threads R 螺纹密封的管螺纹 Pipe threads where pressure-tight joints are made on the threads 锥管外螺纹 Taper external screw threads ISO/R7, GB7306 55° 1/16 Taper Rc 锥管内螺纹 Taper internal screw threads RP 直管内螺纹 Parallel internal pipe threads 55° G 非螺纹密封的管螺纹 Pipe threads where pressure-tight joints are not made on the threads ISO/R228, GB7307 NPT 通用美标锥管螺纹 American Standards taper pipe threads for ANSI/ASEM B1.20.1, 60° 1/16 Taper general use GB/T12716 NPSC 美标直管接头螺纹 American Standards straight pipe threads in pipe coupling ANSI/ASEM B1.20.1 60° NPSM 美标直管机用自由配合接头连接螺纹 American Standards straight pipe threads for free-fitting mechanical joints for fixtures NPTF 美标燃料直管内螺纹 Dryseal American standards fuel internal straight pipe threads ANSI B1.20.3 60° 1/16 Taper NPSF 美标锥管干密封螺纹 Dryseal American standards taper pipe threads 60° BA 英标螺纹 British association threads BS93 47°30〃 BSC 英标自行车螺纹 British standards cycle threads BS811 60° BSW 英标惠氏螺纹 British standards Whitworth threads BS84 55° BSF 英标细牙螺纹 British standards fine threads BSMO 英标显微镜螺纹 British standards microscope objective threads BS3569 FG （德国）自行车螺纹 (Germany)Cycle threads DIN79013 60° Pg （德国）薄钢管螺纹 (Germany)Steel conduit threads DIN40430 80°