Workzone DC-1 / 650080 - Reference Table

Functions
USA
19
Reference table
Convenient reference table for cut-
ting threads (also see the back side
of the caliper):
Metr. ISO
Screw
size
∅ mm
Screw
pitch
∅ mm
Screw
hole
∅ mm
Drill size
∅ mm
3 0.5 2.46 2.5
4 0.7 3.24 3.3
5 0.8 4.13 4.2
6 1 4.92 5
8 1.25 6.65 6.8
10 1.5 8.38 8.5
12 1.75 10.11 10.2
16 2 13.84 14
20 2.5 17.29 17.5
Whitworth
∅ in ∅/in ∅ mm ∅ mm
1/4 20 4.72 5.0
5/16 18 6.13 6.4
3/8 16 7.49 7. 7
1/2 12 9.99 10.25
5/8 11 12.92 13.25
3/4 10 15.8 16.25
7/8 9 18.61 19
1 8 21.34 21.75