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Wood Screws

The diameter and pilot drill size versus wood screw gauge.

Gauge Number Diameter mm Pilot Drill mm Gauge Number Diameter mm Pilot Drill mm

 

 

 

7 3.81 2.3
0 1.6

 

8 4.17 2.4
1 1.78

 

9 4.52 2.6
2 2.08   10 4.88 2.8
3 2.39 1.5 12 5.59 3.2
4 2.74 1.6 14 6.30 3.5
5 3.10 1.8 16 7.01 3.8
6 3.51 Note 1 2.1 18 7.72 4.2

Note 1: For the gauge 6 woodscrew I get lots of different results when I search for the size from 3.45mm 0.138" up to and including 9/64" which is 3.57mm. If anybody out there has a definitive number and reference then please let me know editor@glue-it.com.


Model Engineering Glossary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z