Acme Standard Threads	Whitworth's Standard Screw Threads for Bolts
Whitworth's Standard Threads for Pipes	British Standard Pipe Threads
International Standard Threads     (Metric System)	British Standard Fine Screw Thread
Coarse Thread Series, UNC	Fine Thread Series, UNF

Number of Threads per inch	Depth of Thread (inches)	Width of Top of Thread (inches)	Width of Bottom of Thread (inches)	Space at Top of Thread (inches)	Thickness at Root of Thread (inches)
1	0.5100	0.3707	0.3655	0.6293	0.6345
1½	0.3433	0.2471	0.2419	0.4195	0.4247
2	0.2600	0.1853	0.1801	0.3147	0.3199
3	0.1767	0.1235	0.1183	0.2098	0.2150
4	0.1350	0.0927	0.0875	0.1573	0.1625
5	0.1100	0.0741	0.0689	0.1259	0.1311
6	0.0933	0.0618	0.0566	0.1049	0.1101
7	0.0814	0.0529	0.0478	0.0899	0.0951
8	0.0725	0.0463	0.0411	0.0787	0.0839
9	0.0655	0.0413	0.0361	0.0699	0.0751
10	0.0600	0.0371	0.0319	0.0629	0.0681