Socket Head Cap Screws

Decimal Counterbore Countersink Clearance Drills

Screw Equiv. Screw Head Diameter Depth Diam. (60°) (D)
Size (in) Hex Key Diameter Height (A) (B) (C) Norm. Fit Close Fit
No. 0 0.060 0.050 in 0.096 in 0.060 in 1/8" 0.060 in 0.074 in #49 #51
No. 1 0.073 1/16" 0.118 in 0.073 in 5/32" 0.073 in 0.087 in #43 #46
No. 2 0.086 5/64" 0.140 in 0.086 in 3/16" 0.086 in 0.102 in #36 3/32"
No. 3 0.099 5/64" 0.161 in 0.099 in 7/32" 0.099 in 0.115 in #31 #36
No. 4 0.112 3/32" 0.183 in 0.112 in 7/32" 0.112 in 0.130 in #29 1/8"
No. 5 0.125 3/32" 0.205 in 0.125 in 1/4" 0.125 in 0.145 in #23 9/64"
No. 6 0.138 7/64" 0.226 in 0.138 in 9/32" 0.138 in 0.158 in #18 #23
No. 8 0.164 9/64" 0.270 in 0.164 in 5/16" 0.164 in 0.188 in #10 #15
No. 10 0.190 5/32" 0.312 in 0.190 in 3/8" 0.190 in 0.218 in #2 #5
No. 12 0.216 5/32" 0.345 in 0.216 in 13/32" 0.216 in 1/4" 15/64"
1/4" 0.250 3/16" 0.375 in 0.250 in 7/16" 0.250 in 0.278 in 9/32" 17/64"
5/16" 0.313 1/4" 0.469 in 0.313 in 17/32" 0.313 in 0.346 in 11/32" 21/64"
3/8" 0.375 5/16" 0.563 in 0.375 in 5/8" 0.375 in 0.415 in 13/32" 25/64"
7/16" 0.438 3/8" 0.656 in 0.438 in 23/32" 0.438 in 0.483 in 15/32" 29/64"
1/2" 0.500 3/8" 0.750 in 0.500 in 13/16" 0.500 in 0.552 in 17/32" 33/64"
9/16" 0.563 7/16" 0.844 in 0.563 in 29/32" 0.563 in 39/64" 37/64"
5/8" 0.625 1/2" 0.938 in 0.625 in 1" 0.625 in 0.689 in 21/32" 41/64"
3/4" 0.750 5/8" 1.125 in 0.750 in 1-3/16" 0.750 in 0.828 in 25/32" 49/64"
7/8" 0.875 3/4" 1.313 in 0.875 in 1-3/8" 0.875 in 0.963 in 29/32" 57/64"
1" 1.000 3/4" 1.500 in 1.000 in 1-5/8" 1.000 in 1.100 in 1-1/32" 1-1/64"
1-1/8" 1.125 7/8" 1.688 in 1.125 in 1-13/16" 1.125 in 1-11/64" #26
1-1/4" 1.250 7/8" 1.875 in 1.250 in 2" 1.250 in 1.370 in 1-5/16" 1-9/32"
1-1/2" 1.500 1" 2.250 in 1.500 in 2-3/8" 1.500 in 1.640 in 1-9/16" 1-17/32"
1-3/4" 1.750 1-1/4" 2.625 in 1.750 in 2-3/4" 1.750 in 1.910 in 1-13/16" 1-25/32"
2" 2.000 1-1/2" 3.000 in 2.000 in 3-1/8" 2.000 in 2.180 in 2-1/16" 2-1/32"
M1.6 0.062 1.5 mm 3.0 mm 1.6 mm 3.50 mm 1.6 mm 2.0 mm 1.95 mm 1.80 mm
M2 0.078 1.5 mm 3.8 mm 2.0 mm 4.40 mm 2.0 mm 2.6 mm 2.40 mm 2.20 mm
M2.5 0.098 2 mm 4.5 mm 2.5 mm 5.40 mm 2.5 mm 3.1 mm 3.00 mm 2.70 mm
M2.6 0.102 2 mm 5.0 mm 2.6 mm 6.00 mm 2.6 mm 3.20 mm 3.00 mm
M3 0.118 2.5 mm 5.5 mm 3.0 mm 6.50 mm 3.0 mm 3.6 mm 3.70 mm 3.40 mm
M4 0.157 3 mm 7.0 mm 4.0 mm 8.25 mm 4.0 mm 4.7 mm 4.80 mm 4.40 mm
M5 0.196 4 mm 8.5 mm 5.0 mm 9.75 mm 5.0 mm 5.7 mm 5.80 mm 5.40 mm
M6 0.236 5 mm 10.0 mm 6.0 mm 11.20 mm 6.0 mm 6.8 mm 6.80 mm 6.40 mm
M8 0.315 6 mm 13.0 mm 8.0 mm 14.50 mm 8.0 mm 9.2 mm 8.80 mm 8.40 mm
M10 0.393 8 mm 16.0 mm 10.0 mm 17.50 mm 10.0 mm 11.2 mm 10.80 mm 10.50 mm
M12 0.472 10 mm 18.0 mm 12.0 mm 19.50 mm 12.0 mm 14.2 mm 13.00 mm 12.50 mm
M14 0.551 12 mm 21.0 mm 14.0 mm 22.50 mm 14.0 mm 16.2 mm 15.00 mm 14.50 mm
M16 0.629 14 mm 24.0 mm 16.0 mm 25.50 mm 16.0 mm 18.2 mm 17.00 mm 16.50 mm
M18 0.708 14 mm 27.0 mm 18.0 mm 28.50 mm 18.0 mm 19.00 mm 18.50 mm
M20 0.787 17 mm 30.0 mm 20.0 mm 31.50 mm 20.0 mm 22.4 mm 21.00 mm 20.50 mm
M24 0.944 19 mm 36.0 mm 24.0 mm 37.50 mm 24.0 mm 26.4 mm 25.00 mm 24.50 mm
M30 1.181 22 mm 45.0 mm 30.0 mm 47.50 mm 30.0 mm 33.4 mm 31.50 mm 31.00 mm
M36 1.417 27 mm 54.0 mm 36.0 mm 56.50 mm 36.0 mm 39.4 mm 37.50 mm 37.00 mm
M42 1.653 63.0 mm 42.0 mm 66.00 mm 42.0 mm 45.6 mm 44.00 mm 43.00 mm
M48 1.889 72.0 mm 48.0 mm 75.00 mm 48.0 mm 52.6 mm 50.00 mm 49.00 mm