Wood & Self Tapping Screw Gauges

Screw Gauge Number vs Diameter

 
     
Use this chart to convert screw diameter to screw gauge number.
     
Screw Gauge Number Diameter (inches) Diameter (millimetres)
0 0.060 1.52
1 0.073 1.78
2 0.086 2.20
3 0.099 2.52
4 0.112 2.84
5 0.125 3.18
6 0.138 3.51
7 0.151 3.84
8 0.164 4.18
10 0.190 4.83
12 0.216 5.49
14 0.242 6.15
16 0.268 6.81