Wood Screws

The diameter and pilot drill size versus wood screw gauge.

Wood screw with point and spiral to left and countersunk head to right.

Gauge NumberDiameter mmPilot Drill mm
01.6
11.78
22.08
32.391.5
42.741.6
53.11.8
63.572.1
73.812.3
84.172.4
94.522.6
104.882.8
125.593.2
146.33.5
167.013.8
187.724.2

See also: Screw, Screwdriver, Wall Plug, Wood.

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Subjects: Civil Engineering Fixings and Fasteners