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Part Number All OMEGA

Pipe Taper and Straight Thread Dimensions

*National Pipe Taper and Straight Thread Dimension

	NPT Size	Threads Per Inch	Dim "A" (In.)	Dim "B" (In.)
	1/16	27	.312	.261
	1/8	27	.405	.264
	1/4	18	.540	.402
	3/8	18	.675	.408
	1/2	14	.840	.534
	3/4	14	1.050	.546
	1	11^1/2	1.315	.683
	1^1/4	11^1/2	1.660	.707

Dim A refers to the height of the diameter, Dim B refers to the length of the threaded pipe are

	Nominal Thread Size	Threads Per Inch		Major Diameter	W	H	L
	Nominal Thread Size	Coarse (UNC)	Fine (UNF)	Major Diameter	W	H	L
	0	-	80	0.0600
	1	64	72	0.0730
	2	56	64	0.0860
	3	48	56	0.0990
	4	40	48	0.1221
	5	40	44	0.1250
	6	32	40	0.1380
	8	32	36	0.1640
	10	24	32	0.1900
	12	24	28	0.2160
	1/4	20	28	0.2500	7/16	11/64	0.750
	5/16	18	24	0.3125	1/2	7/32	0.875
	3/8	16	24	0.3750	9/16	1/4	1.000
	7/16	14	20	0.4375	5/8	19/64	1.125
	1/2	13	20	0.5000	3/4	11/32	1.250
	9/16	12	18	0.5625	13/16	3/8	1.375
	5/8	11	18	0.6250	15/16	27/64	1.500
	3/4	10	16	0.7500	11/8	1/2	1.750
	7/8	9	14	0.8750	15/16	37/64	2.000
	1	8	12	1.0000	11/2	43/64	2.250
	11/8	7	12	1.1250	111/16	3/4	2.500
	11/4	7	12	1.2500	17/8	27/32	2.750
	13/8	6	12	1.3750	21/16	29/32	3.000
	11/2	6	12	1.5000	21/4	1	3.250