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Wood Screw Diameter Table

Screw Size Major Diameter (inches) Nearest Fraction Major Diameter (mm)
#1 0.073″ 5/64″ 1.85 mm
#2 0.086″ 5/64″ 2.18 mm
#3 0.099″ 3/32″ 2.51 mm
#4 0.112″ 7/64″ 2.84 mm
#5 0.125″ 1/8″ 3.18 mm
#6 0.138″ 9/64″ 3.51 mm
#7 0.151″ 5/32″ 3.84 mm
#8 0.164″ 11/64″ 4.17 mm
#9 0.177″ 11/64″ 4.50 mm
#10 0.190″ 3/16″ 4.83 mm
#11 0.203″ 13/64″ 5.16 mm
#12 0.216″ 7/32″ 5.49 mm
#13 0.229″ 15/64″ 5.82 mm
#14 0.242″ 1/4″ 6.15 mm
#15 0.255″ 1/4″ 6.48 mm
#16 0.268″ 17/64″ 6.81 mm
#17 0.281″ 9/32″ 7.14 mm
#18 0.294″ 19/64″ 7.47 mm
#19 0.307″ 5/16″ 7.80 mm
#20 0.320″ 5/16″ 8.13 mm
#21 0.333″ 21/64″ 8.46 mm
#22 0.346″ 11/32″ 8.79 mm
#23 0.359″ 23/64″ 9.12 mm
#24 0.372″ 3/8″ 9.45 mm
#25 0.385″ 25/64″ 9.78 mm

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Disclaimer:
The content on this webpage is for informational purposes only. MISUMI makes no guarantees, expressed or implied, regarding the accuracy, completeness, or validity of the information. Performance parameters, tolerances, designs, materials, or processes should not be assumed to reflect third-party suppliers’ or manufacturers’ deliverables within MISUMI’s network. Buyers are responsible for specifying their part requirements