McFeely's Screw Size Drilling Chart

1 Screw size Drilling ChartStandard Wood Screw Sizes and Predrilling RecommendationsScrew size (Gauge)#2#3#4#5#6#7#8#9 #10 #12 #14 #16 #18 HeadBoreSizeActual HeadSize11/6413/6415/641/49/325/1611/322 3/6425/647/161/235/6439 5/165/16 3/83/83/83/8 3/8 1/2 1/2 1/2 5/8 5/8 Screw Shank - Hole Size3/327/647/641/89/645/3211/643/1613/6 47/321/49/325/16 StraightPilot DrillSizeHardwood1/165/645/643/327/647/6 41/89/649/645/3211/643/167/32 Softwood1/161/161/165/643/323/327/641/81 /89/645/3211/6413/64 Brad PointPilot DrillSizeHardwood1/165/645/643/327/647/6 41/89/649/645/3211/643/167/32 Softwood1/161/161/165/643/323/327/641/81 /89/645/3211/6413/64 TaperedPilot DrillSizeHardwood3/327/647/641/89/645/32 11/643/1613/647/321/49/325/16

2 Softwood5/643/323/327/641/89/645/3211/64 3/1613/6415/6417/6419/64 RecommendedCountersink NumberCS02-0093C4C4CS03-0125CS03-0140CS0 3-0156CS03-0171CS03-0187CS04-0203CS04-02 18C14 C169 C18 Recommended PlugCutter1/45/165/163/83/83/83/83/81/21 /21/25/85/8 Recommended SelfCentering Bit3/323/327/647/641/89/647/1611/643/16 Drill Length Recommendations for Countersink/Taper Point Drill CombosScrew size (Gauge)#2 #3#4#5#6#7#8#9#10 #12 #14 #16 #18 Tapered Drill Size3/32 7/64 7/641/89/645/3211/643/16 13/64 7/32 1/4 9/32 5/16 ShortLengthDrillMin. ScrewLength1/4 5/16 5/16 3/8 7/161/25/811/16 3/4 7/8 3/4 13/16 7/8 Max.

3 ScrewLength *5/8 11/16 11/16 5/8 11/16 13/167/815/16 1 1-1/8 1-1/4 1-7/161-9/16 RegularLengthDrillMin. ScrewLength3/87/167/161/29/165/83/413/16 15/1611-1/8 1-1/4 1-3/8 Max. ScrewLength **11-1/21-3/81-3/81-1/21-3/41-7/82-1/82- 1/42-3/82-5/8 2-5/162-11/16 LongLengthDrillMin. ScrewLength9/169/169/165/811/163/47/815/ 161-1/161-1/81-5/161-7/161-9/16 Max. ScrewLength**1-3/421-7/82-1/82-3/82-3/82 -3/42-3/4333-1/83-1/163-3/168 in. LongDrillsMin. ScrewLengthN/AN/AN/A3/413/1611-1/161-3/1 61-1/4 1-1/4 1-1/2 1-5/8 1-3/4 Max. ScrewLength**N/AN/AN/A4-3/44-3/44-3/44-3 /44-3/44-3/4 4-3/4 4-3/44-11/164-11/16* = 1/2 in. to 3/4 in.

4 Of shank for chucking ** = 3/4 in. to 1 in. of shank for chucking ** = Set screws positioned at end of twistWARNING: Cutting tools may shatter when broken. The wearing of eye protection is strongly advised in the vicinity of their : Drilling , sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to causecancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go TACT INFORMATIONADDRESS320 N State Street Harrison, OH 45030 PHONE(800) DAYS/HOURSMon - Fri 8:30AM - 5:30PM EST