Orthogonal Thought | Random musings from the creator of Cooking For Engineers and Lead Architect of Fanpop





Pilot Hole Sizes for Metal Screws and Wood Screws

Posted 30 January, 2010 at 9:43pm by Michael Chu
(Filed under: Life)

While installing shelving in my home, I had to drill pilot holes for #8 and #12 Metal Screws into studs. The problem was, I didn't know how big to drill the holes and when the holes were too small, it was quite difficult to drive the screws into place. I didn't want to make the pilot holes too big because I wanted the shelves to be as sturdy as possible, so I ended up eyeballing the bits (so the shank of the screw would be covered but not the threads) then moving up in size one at a time until I could drive the screws in. Later, I looked up the bit sizes for the screws and decided to post them here for future reference. Hopefully, they will be of help to others as well.

Metal Screws

Screw Size Bit
#4 3/32"
#6 7/64"
#8 1/8"
#10 9/64"
#12 5/32"
#14 (1/4") 3/16"
5/16" 1/4"

Wood Screws - Hard Wood

Screw Size Tapered Bit Straight Bit
2 3/32 1/16
3 7/64 5/64
4 7/64 5/64
5 1/8 3/32
6 9/64 7/64
7 5/32 7/64
8 11/64 1/8
9 3/16 9/64
10 13/64 9/64
12 7/32 5/32
14 1/4 11/64
16 9/32 3/16
18 5/16 7/32
20 21/64 15/64
24 3/8 17/64

Wood Screws - Soft Wood

Screw Size Tapered Bit Straight Bit
2 5/64 1/16
3 3/32 1/16
4 3/32 1/16
5 7/64 5/64
6 1/8 3/32
7 9/64 3/32
8 5/32 7/64
9 11/64 1/8
10 3/16 1/8
12 13/64 9/64
14 15/64 5/32
16 17/64 11/64
18 19/64 13/64
20 5/16 7/32
24 3/8 1/4

Wood Screws - Counter Sink Size

Screw Size Counter Sink Size
2 1/4
3 1/4
4 1/4
5 5/16
6 5/16
7 5/16
8 3/8
9 3/8
10 7/16
12 7/16
14 1/2
16 9/16
18 5/8
20 3/4
24 3/4

23 comments to Pilot Hole Sizes for Metal Screws and Wood Screws

Scott, January 30th, 2010 at 9:59 pm:

  • Greatest book in the history of mankind:

    Everyone should have one. It has every little nugget of information like those measurements you posted, the relative density of metals, strengths of different types of rope, "10" radio codes, Air Force ranks, Airport elevations, greek alphabet, North American area codes sorted by state, birthstones by month, planetary date on Jupiter, the effects of different oils on bolt torque, etc etc.

    The only problem with this book…if you loan it out, you'll never get it back. :-p

Dave Skolnick, February 13th, 2010 at 7:02 am:

  • If you don't already do it, try lubricating the threads of your screw with soap (I have always used cake soap, and have never tried liquid soap). It makes driving the screws in much easier and has no discernible impact on holding.

    - dave

Scott, February 13th, 2010 at 11:35 am:

  • Candle wax works, too.

Ken, June 1st, 2013 at 9:29 am:

  • Thank you for posting this. It was very helpful! =)

バーバリー パンツ, December 27th, 2014 at 10:29 am:

  • ねえちょうどあなたに素早く頭を与えたいと思った。 |あなたはテキストの単語ポストの画面からはみ出ているように見えるサファリ。問題またはWebブラウザとは何か|これは書式形式である場合、私はよく分からないの互換性が、私はを考え出した私はあなたが知っているように投稿したいと思います。 デザインはしかしとてもよく似合う!あなたが得るホープすぐに問題 。 乾杯
    バーバリー パンツ http://www.gdiamondinc.com/shoppage/burberry.asp?7a6c0z9burberry1/281lmb2b1.html

バーバリーブラックレーベル財布値段, December 29th, 2014 at 2:19 pm:

  • 私はオフトピック場合は、これを知っているが、私は自分の始めに探していますブログと不思議したすべてがに必要とされるもの取得するには?私はあなたのようなブログはかなりの費用がかかるだろう持つと仮定している?私は今ではない、非常にインターネットスマートので、私は100%ではないんだ一定。どれヒントやアドバイスをいただければ幸いです。 おかげで
    バーバリーブラックレーベル財布値段 http://www.ftgsoccer.com/popone/burberry.asp?0l4c0p1burberry1/377hug4b1.html

Welcome To Buy Authentic Nike Air Max 24-7 Mens, March 13th, 2015 at 8:35 pm:

  • Hey! This is kind of off topic but I need some advice from an established blog. Is it difficult to set up your own blog? I'm not very techincal but I can figure things out pretty fast. I'm thinking about making my own but I'm not sure where to start. Do you have any points or suggestions? Cheers

Our New Mens Nike Air Max LTD 2 Blue Running In A Good Quality, March 19th, 2015 at 12:20 pm:

  • not that much of a internet reader to be honest but your sites really nice, keep it up! I'll go ahead and bookmark your website to come back in the future. All the best

ray ban eyeglasses rb5144 2000 black, March 19th, 2015 at 4:22 pm:

  • Together with almost everything that appears to be developing inside this specific subject material, many of your viewpoints are generally fairly exciting. Even so, I am sorry, but I can not give credence to your entire strategy, all be it exciting none the less. It would seem to everyone that your opinions are not entirely justified and in reality you are generally yourself not really completely certain of your assertion. In any event I did enjoy reading through it.
    ray ban eyeglasses rb5144 2000 black http://metalpressingyorkshire.co.uk/shop.asp?url=ray-ban-eyeglasses-rb5144-2000-black-b-1719.html

have A Good Time, March 20th, 2015 at 4:45 pm:

  • It's a shame you don't have a donate button! I'd certainly donate to this fantastic blog! I suppose for now i'll settle for book-marking and adding your RSS feed to my Google account. I look forward to brand new updates and will talk about this blog with my Facebook group. Chat soon!

最新正規品, July 9th, 2015 at 7:27 am:

sitemap, July 17th, 2015 at 9:00 pm:

Economico all\'ingrosso Adidas Stan Smith Nucleo Nero, September 8th, 2015 at 7:17 pm:

  • Hey would you mind sharing which blog platform you're using? I'm going to start my own blog in the near future but I'm having a difficult time making a decision between BlogEngine/Wordpress/B2evolution and Drupal. The reason I ask is because your layout seems different then most blogs and I'm looking for something unique. P.S Sorry for getting off-topic but I had to ask!

hay day unlimited coins and diamonds, February 5th, 2017 at 9:52 am:

  • Inexpensive glitch is helping all type of tablet computers, iPad, iPad 2 Air, iPod, apple iphone,
    iPad Mini, iPad Touch and other mobile phones.

boom beach unlimited diamonds, February 19th, 2017 at 11:47 pm:

  • Which means this indicates there exists not a solitary
    technique of your savings account obtaining forbidden from
    the Boom Beach video game servers when functioning our cheats for Boom Beach to incorporate video game components for your individual account.

    I hope I have actually answered to your assumptions
    as well as I wish you an excellent game worldwide of Boom Beach.
    This change in guide length could mostly be discussed with the growth of the audience in between the launch of the two titles and
    also one ought to truly value the adaptive capacities of Supercell.

    I'm offering Boom Beach a shot specifically since it doesn't have the clans and conversation attributes, just developing, expedition and
    also fighting. All you have to do is giving the account you wish to create resources for with the
    amount of sources as well as you'll excel to go. The Boom Beach hack
    device is compatible with all variations of the android, ios and also game and gamers can make use of the hack by
    browsers with internet access.

Michael in KS, July 7th, 2017 at 10:12 pm:

  • Thank you for sharing this!

Cheap NFL Jerseys China, August 1st, 2017 at 12:18 pm:

  • The then opposition—A Partnership for National Unity and the Alliance For Change—had dubbed Jagdeo’s actions, just a few days before he demitted office, illegal.
    Cheap NFL Jerseys China http://www.cheapjerseysfan.us.com/

seo plugin, August 1st, 2017 at 1:13 pm:

  • Hello Web Admin, I noticed that your On-Page SEO is is missing a few factors, for one you do not use all three H tags in your post, also I notice that you are not using bold or italics properly in your SEO optimization. On-Page SEO means more now than ever since the new Google update: Panda. No longer are backlinks and simply pinging or sending out a RSS feed the key to getting Google PageRank or Alexa Rankings, You now NEED On-Page SEO. So what is good On-Page SEO?First your keyword must appear in the title.Then it must appear in the URL.You have to optimize your keyword and make sure that it has a nice keyword density of 3-5% in your article with relevant LSI (Latent Semantic Indexing). Then you should spread all H1,H2,H3 tags in your article.Your Keyword should appear in your first paragraph and in the last sentence of the page. You should have relevant usage of Bold and italics of your keyword.There should be one internal link to a page on your blog and you should have one image with an alt tag that has your keyword….wait there's even more Now what if i told you there was a simple Wordpress plugin that does all the On-Page SEO, and automatically for you? That's right AUTOMATICALLY, just watch this 4minute video for more information at. Seo Plugin

Wholesale China Jerseys, August 1st, 2017 at 3:30 pm:

  • However, there were protests after ex-president, Bharrat Jagdeo, shortly before he ended his tenure in 2011, named several close friends and his party as being the recipients of broadcast licences for radio stations.
    Wholesale China Jerseys http://www.cheapnfljerseysonsale.us/

Wholesale NFL jerseys, August 1st, 2017 at 6:40 pm:

  • The ICT project has three main parts; installation of communication fibre optic network from Georgetown to Lethem called the Brazil to Guyana fibre optic cable.
    Wholesale NFL jerseys http://www.ityzzy.com/

Cheap Stitched Jerseys, August 1st, 2017 at 10:44 pm:

Cheap Jerseys From China, August 2nd, 2017 at 7:13 am:

customize your own jersey, August 19th, 2017 at 1:17 am:

  • customize your own jersey.customize
    your own jersey-Welcome to buy cheap nfl apparel from China with
    free shipping and best service in our jerseys online

Your comment: