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螺纹代号Thread Code
浏览次数:5680      发布时间:2011-4-20    
    

螺纹代号Thread Code

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"
        20-每寸20牙twenty teeth per inch
        UNC-美标统一制粗牙螺纹unified coarse pitch thread ( American standard)

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