管牙 螺絲攻

規格	PIPE TAPS
	NPT		PT		NPS		PS
	牙數		牙數		牙數		牙數
1/8"	27	◎	28	◎	27	◎	28	◎
1/4"	18	◎	19	◎	18	◎	19	◎
3/8"	18	◎	19	◎	18		19	◎
1/2"	14	◎	14	◎	14		14	◎
5/8"	14		14		14		14
3/4"	14	◎	14	◎	14		14	◎
1"	11-1/2	◎	11	◎	11-1/2		11	◎
1.1/4"	11-1/2		11	◎	11-1/2		11
1.1/2"	11-1/2		11	◎	11-1/2		11
2"	11-1/2		11	◎	11-1/2		11

27 切削工具 60 螺絲攻