| 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 | ISO68GB196 | 60° |
| Metric screw threads | 细牙系列Fine series | ISO724GB196 | ||
| S | 小螺纹Miniature screw threads | ISO1501GB/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 diameterpitch length of engagmentand | |||
| UN | 等螺距系列Constant-pitch series | |||
| Tr | 公制梯形螺纹Metric trapezoidalscrew threads | ISO2904GB5796 | 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 | 锥管内螺纹Taper external screw threads | ISO/R7GB7306 | 55°1/16 Taper |
| Rc | 锥管外螺纹Taper internal screw threads | |||
| RP | 直管螺纹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/R228GB7307 | ||
| NPT | 通用美标锥管螺纹American Standards taper pipe threads for general use | ANSI/ASEM B1.20.1GB/T12716 | 60°1/16 Taper | |
| NPSC | 美标直管接头螺纹American Standards striaght pipe threads in pipe coupling | ANSI/ASEM B1.20.1 | 60° | |
| NPSM | 美标直管机用自由配合接头联接螺纹American Standards striaght pipe threads for free-fitting mechanical joints for fixtures |
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| 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 | 美标锥管气密螺纹Dryseal American standards taper pipe threads | 60° | ||
| BA | 英标联接螺纹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° | |
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