ORDERING CODE規格		Pitch螺距		Dimension基本尺寸
External	Internal	MM	TPI	L	D	Y	X
			27	11	6.35	0.8	0.7
			18	11	6.35	1.0	0.8
			14	11	6.35	1.0	0.8
16ER 27 NPTF			27	16	9.525	0.8	0.7
16ER 18 NPTF			18			1.0	0.8
16ER 14 NPTF			14			1.2	0.9
16ER 11.5NPTF			11.5			1.5	1.1
16ER 8  NPTF			8			1.8	1.3