Coarse and Fine Threaded Screw Information
All Diameters in Inches

Size	Threads/Inch		Outside Diameter	Tap Drill		Body Drill
	UNC	UNF		Diameter	Index	Diameter	Index
0	-	80	.0600	.0469	3/64"	.0625	1/16"
1	64 -	- 72	.0730	.0595	53	.0760	48
2	56 -	- 64	.0860	.0700	50	.0890	43
3	48 -	- 56	.0990	.0785 .0810	47 46	.1040	37
4	40 -	- 48	.1120	.0890 .0935	43 42	.1160	32
5	40 -	- 44	.1250	.1015 .1040	38 37	.1285	30
6	32 -	- 40	.1380	.1065 .1130	36 33	.1440	27
8	32 -	- 36	.1640	.1360	29	.1695	18
10	24 -	- 32	.1900	.1470 .1590	26 21	.1960	9
12	24 -	- 28	.2160	.1770 .1800	16 15	.2210	2
1/4	20 -	- 28	.2500	.2010 .2130	7 3	.2750	F
5/16	18 -	- 24	.3125	.2570 .2720	F I	.3230	P
3/8	16 -	- 24	.3750	.3125 .3320	5/16" Q	.3860	W
7/16	14 -	- 20	.4375	.3680 .3906	U 25/64"	.4531	29/64"
1/2	13 -	- 20	.5000	.4219 .4531	27/64" 29/64"	.5156	33/64"
9/16	12 -	- 18	.5625	.4844 .5156	31/64" 33/64"	.5781	37/64"
5/8	11 -	- 18	.6250	.5312 .5781	17/32" 37/64"	.6406	41/64"
3/4	10 -	- 16	.7500	.6562 .6875	21/32" 11/16"	.7813	25/32"
7/8	9 -	- 14	.8750	.7656 .8125	49/64" 13/16"	.9063	29/32"

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