55°圆锥管螺纹型式和尺寸螺纹代号基本尺寸英寸大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高度H1圆弧尺寸r底孔尺寸mmR1/161/16"7
907287
4R1/81/8"9
907289
4R1/41/4"13
3371912
2R3/83/8"16
3371915
75R1/21/2"20
8141419
25R3/43/4"26
8141425
75R11"33
3091131
31730R11/411/4"41
3091140
5R11/211/2"47
3091146
5R22"59
3091158
31756R21/221/2"75
3091173
31771R33"87
3091186
5R44"113
30911111
551110
317110
5R55"138
30911136
951135
317136R66"163
30911162
351160
317161
555°圆柱管螺纹的型式和尺寸BritishPipeThread(惠氏管螺纹