What size of drill bit is used for a pilot hole in lumber?

Drill bit sizes for pre-drilling (most commonly used sizes in bold)
Screw SizePilot hole size for hardwoods*Pilot hole size for softwood**
#13/641/32
#23/643/32
#31/163/64
#41/163/64
A.

What size pilot hole to drill for #8 screw?

Wood Screw Pilot Hole Sizes
Screw SizeHard WoodSoft Wood
Tapered BitStraight Bit
#75/32"3/32"
#811/64"7/64"
#93/16"1/8"
  • What size is a number 10 hole?

    Wood Screw Pilot Hole Sizes
    Screw SizeHard Wood
    Tapered BitStraight Bit
    #93/16"9/64"
    #1013/64"9/64"
    #127/32"5/32"
  • Is cedar wood hard or soft?

    Softwoods aren't weaker than hardwoods. Softwoods come from coniferous trees such as cedar, fir, and pine and tend to be somewhat yellow or reddish. Because most coniferous trees grow fast and straight, softwoods are generally less expensive than hardwoods.
  • What is a taper drill bit used for?

    Uses for Taper Drill Bits. Taper Point Drills were engineered to be used to pre drill the pilot holes for the shank and threaded portion of a wood screw. The object, of course, is to use the proper size drills and drill to the proper depth to insure the best holding power from the wood screw.

Updated: 22nd September 2018

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