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2024年1月18日发(作者:仓颉编程工具)

螺纹制式说明

NPT为60度牙型角锥管螺纹

用螺纹密封的管螺纹其标记及各种螺纹的特征代号规定如下:

Rc—圆锥内螺纹

Rp—与圆锥外螺纹配合的圆柱内螺纹

R—圆锥外螺纹

G螺纹表示非螺纹密封的管螺纹

Z就是NPT螺纹

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 AB: 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

但还有GAZ是表示什么螺纹呢?


本文标签: 螺纹 代号 锥管 统一