Machine Screw Sizes

I never can remember this stuff...so here it is:

Size	Diameter (inch)	Usage
0	.0600	uncommon
1	.0730	uncomon
2	.0860	uncommon
3	.0990	uncommon
4	.1120
5	.1250	uncommon
6	.1380	commonly used small
8	.1640	very common
10	.1900	very common
12	.2160	common but large
1/4	.2500
5/16	.3125
3/8	.3750

From http://www.mechanicsupport.com/articleScrewSize.html