3、B18.6.3 公称尺寸 #2#3#4#5#6#7 #8#10#12螺纹尾形 ABABA ABA ABA ABA ABA ABA ABA ABB.BT B.BT B.BT B.BT B.BT B.BT B.BT B.BT B.BT 每寸扣数T.I.P 3223242018201619151812161114外径 最大(mm)2.242.572.93.33.583.534.013.914.274.224.934.85.615.46最小(mm) 2.132.462.793.23.463.433.863.794.124.