Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

US Wood Screws - Pilot Holes

Hard wood and soft wood pilot holes, shank clearance holes and countersink diameters.

Sponsored Links

Wood screws - shank diameters and pitot holes

Approximate hole size for wood screws used in hard wood and soft wood:

For full table - rotate the screen!

US Wood Screws - Pilot Holes
Nominal Size
no.
Nominal Shank Diameter
(in)
Actual Shank Diameter
(in)
Twist Drill Size
Pilot HolesShank Clearance Holes80o Countersink Diameter
Hard WoodSoft Wood
Inch
No.Inches
No.Inch
No.Actual Head Diameter
(in)
Diameter
(in)
0 0.060 0.064 3/64 58 1/32 69 1/16 52 0.119 1/8
1 0.073 0.077 3/64 55 1/32 65 5/64 47 0.146 3/16
2 0.086 0.090 1/16 53 3/64 59 3/32 42 0.172 3/16
3 0.099 0.103 1/16 51 3/64 56 7/64 37 0.199 1/4
4 0.112 0.116 5/64 48 3/64 55 7/64 32 0.225 1/4
5 0.125 0.129 5/64 44 1/16 53 1/8 30 0.252 1/4
6 0.138 0.142 3/32 42 1/16 52 9/64 27 0.279 3/8
7 0.151 0.155 3/32 38 1/16 50 5/32 22 0.305 3/8
8 0.164 0.168 7/64 35 5/64 48 11/64 18 0.332 3/8
9 0.177 0.181 1/8 32 5/64 46 3/16 14 0.358 3/8
10 0.190 0.194 1/8 30 3/32 44 3/16 10 0.385 1/2
11 0.203 0.207 1/8 29 3/32 43 13/64 4 0.412 1/2
12 0.216 0.220 9/64 27 3/32 39 7/32 2 0.438 1/2
14 0.242 0.246 5/32 20 7/64 34 1/4 D 0.507 1/2
16 0.268 0.272 3/16 16 1/8 31 17/64 I 0.544 5/8
18 0.294 0.298 3/16 10 9/64 29 19/64 N 0.635 5/8
20 0.320 0.324 7/32 3 5/32 26 21/64 P 0.650 3/4
24 0.372 0.376 1/4 D 11/64 18 3/8 V 0.762 3/4
Sponsored Links

Related Topics

  • Fasteners

    Bolts, nuts and threaded rods - torque, tension and loads.
  • Miscellaneous

    Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.

Related Documents

Sponsored Links

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

Citation

This page can be cited as

  • The Engineering ToolBox (2009). US Wood Screws - Pilot Holes. [online] Available at: https://www.engineeringtoolbox.com/wood-screws-holes-d_1519.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































2.19.10

Sponsored Links
.