平時用開既G1/4 fitting 牙距係幾多?


想係呢個水箱底同頂鑽多個G1/4既孔
但係我見G1/4絲攻都有幾種規格
G1/4-19(BSPP?), G1/4-20(BSW?), G1/4-28(BSF?)
到底應該用邊種?BSPP?
鑽咀係咪應該用11.5mm?有冇ching知?

牙距19,鑽孔11.7mm,11.5mm都可以

TOP