CNC Design Dimensions, Ground Thread

General Dimensions
 

 

NOMINAL DIAMETER RANGE - INCHES MACHINE SCREW SIZE NO. NOMINAL FRACTIONAL DIAMETER INCHES NOMINAL METRIC DIAMETER MILLIMETER STYLE TAP DIMENSIONS - INCHES
OVER TO (INCL.) OVERALL LENGTH
A 		THREAD LENGTH
F 		REACH B SHANK DIAMETER D SQUARE SIZE C/E
0.104 0.117 4     1 1-7/8 5/16 25/32 0.141 3/16X.110
0.117 0.13 5 1/8 M3, M3.15 1 1-15/16 5/16 25/32 0.141 3/16X.110
0.13 0.145 6   M3.5 1 2 3/8 13/16 0.141 3/16X.110
0.145 0.171 8 5/32 M4 1 2-1/8 3/8 7/8 0.168 1/4X.131
0.171 0.197 10 3/16 M4.5, M5 1 2-3/8 1/2 1 0.194 1/4X.152
0.197 0.223 12 7/32   1 2-3/8 1/2 1-1/16 0.22 9/32X.165
0.223 0.26 14 3/4 M6, M6.3 2 2-1/2 5/8 1-1/8 0.255 5/16X.191
0.26 0.323   5/16 M7, M8 2 2-23/32 11/16 1-1/4 0.318 3/8X.238
0.323 0.395   7/8 M10 2 2-15/16 3/4 1-5/16 0.381 7/16X.286
0.395 0.448   7/16   3 3-5/32 7/8 - 0.323 13/32X.242
0.448 0.51   1/2 M12, M12.5 3 3-3/8 15/16 - 0.367 7/16X.275
0.51 0.573   9/16 M14 3 3-19/32 1 - 0.429 1/2X.322
0.573 0.635   7/8 M16 3 3-13/16 1-1/8 - 0.48 9/16X.360
0.635 0.709   11/16 M18 3 4-1/32 1-3/16 - 0.542 5/8X.406
0.709 0.76   3/4   3 4-1/4 1-1/4 - 0.59 11/16X.422