Screw Size and Conversion Tables

Screw Size
Size Number	000	00	0	1	2	3	4	5	6	8	10	12
Diameter	.034	.047	.060	.073	.086	.099	.112	.125	.138	.164	.190	.216
Hole Diameter	.040	.053	.066	.080	.094	.107	.120	.133	.146	.173	.198	.224

Decimal and Millimeter Equivalents of Fractional Parts of an Inch
Fraction	Decimal	Millimeter		Fraction	Decimal	Millimeter		Fraction	Decimal	Millimeter
1	1.0000	25.4000		21/32	0.6562	16.6687		5/16	0.3125	7.9375
63/64	0.984	25.0031		41/64	0.6406	16.2719		19/64	0.2969	7.5406
31/32	0.9688	24.6062		5/8	0.6250	15.8750		9/32	0.2812	7.1437
61/64	0.9531	24.2094		39/64	0.6094	15.4781		17/64	0.2656	6.7469
15/16	0.9375	23.8125		19/32	0.5938	15.0813		1/4	0.2500	6.3500
59/64	0.9219	23.4156		37/64	0.5781	14.6844		15/64	0.2344	5.9531
29/32	0.9062	23.0187		9/16	0.5625	14.2875		7/32	0.2188	5.5563
57/64	0.8906	22.6219		35/64	0.5469	13.8906		13/64	0.2031	5.1594
7/8	0.8750	22.2250		17/32	0.5312	13.4937		3/16	0.1875	4.7625
55/64	0.8594	21.8281		33/64	0.5156	13.0969		11/64	0.1719	4.3656
27/32	0.8438	21.4312		1/2	0.5000	12.7000		5/32	0.1562	3.9688
53/64	0.8281	21.0344		31/64	0.4844	12.3031		9/64	0.1406	3.5719
13/16	0.8125	20.6375		15/32	0.4688	11.9062		1/8	0.1250	3.1750
51/64	0.7969	20.2406		29/64	0.4531	11.5094		7/64	0.1094	2.7781
25/32	0.7812	19.8438		7/16	0.4375	11.1125		3/32	0.0938	2.3812
49/64	0.7656	19.4469		27/64	0.4220	10.7188		5/64	0.0781	1.9844
3/4	0.7500	19.0500		13/32	0.4062	10.3187		1/16	0.0625	1.5875
47/64	0.7344	18.6531		25/64	0.3906	9.9219		3/64	0.0469	1.1906
23/32	0.7188	18.2563		3/8	0.3750	9.5250		1/32	0.0312	0.7937
45/64	0.7031	17.8594		23/64	0.3594	9.1281		1/64	0.0156	0.3969
11/16	0.6875	17.4625		11/32	0.3438	8.7312		--	--	--
43/64	0.6719	17.0656		21/64	0.3281	8.3344		--	--	--