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螺纹各国标准对照
发布时间:2016-12-27   点击次数:2183次
一、英制螺纹(螺纹牙型角55度)Thread of British standard ( Thread pitch shape angle 55°) BSW----英国标准惠氏螺纹(粗牙)British Standard Whitworth Thread ( Coarse ) BSF----英国标准惠氏螺纹(细牙)British Standard Whitworth Thread ( Fine ) G----直管螺纹(外螺纹分A、B两面级、丝锥分G、G-D)Straight pipe thread ( Outside ) thread in A\B: taps in G、G-D ) R----锥管外螺纹(旧代号ZG;KG)Outside paper pipe thread ( Old thread code ZG,KG ) RC----锥管内螺纹(旧代号ZG;KG)Inside taper pipe thread ( Old thread code ZG,KG ) 二、美制螺纹(螺纹牙型角60度)Thread of American standard ( Thread pitch shape angle 60° UNC----统一制粗牙螺纹(代替NC)Unified coarse pitch thread ( Instead of NC ) UNF----统一制细牙螺纹(代替NF)Unified fine pitch thread ( Instead of NF ) UNEF----统一制超细牙螺纹Unified superfine pitch thread UN-----统一制不变螺距螺纹Unified thread UNS----统一制特殊螺纹Unified Special thread NPT----一般用途锥管螺纹(旧代号Z;K)Taper pipe thread for general purpose ( Old thread code Z,K ) NPSC----管接头直管内螺纹Internal straight pipe thread for connection NPSM----设备上自由配合,机械连接用直管螺纹Straight pipe thread for general purpose NPTF----干密封锥管螺纹Dryseal taper pipe thread NPSF----干密封燃油直管螺纹Dryseal straight pipe internal thread NGT----气瓶用锥螺纹Special thread for gas cylinder 三、米制螺纹Metric thread ZM-----米制锥管螺纹 Metric taper pipe thread 四、其它螺纹Other threads SM----缝纫机螺纹Thread for sewing machine PZ----气瓶用锥螺纹Special thread for gas cylinder 5V1-20V1-气门芯螺纹5V1-20V1-Tyre valve thread 螺纹代号说明示例:Explanation of thread code. e. g. 1/4-20UNC 1/4-公称直径1/4" nominal dia. 1/4"

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