对应型号： 螺纹规格：   常用叫法           螺纹直径
-01              G1/8                 1分            约9.5-10MM
-02              G1/4                 2分           约12-12.5MM
-03              G3/8                 3分           约16-16.2MM
-04              G1/2                 4分           约20-20.3MM

-06              G3/4                 6分           约25.5-25.8MM