Sheet Metal Pilot Hole Size Chart

This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.

Sheet metal pilot hole size chart. Brass isn t the only exception here any wood screw made of a material that s softer than steel should go up a size as well. 7 64 5 64 3 32 1 16 1 4 5. Pilot hole and shank clearance hole boring recommendations for wood screws screwdiameter bit or drill sizes no of auger bit to counterbore for striking head for shank clearance holes for pilot holes hard woods soft woods twist bitnearest size in fractions of an inch drill gauge no or letter to be used for maximum holdi. Print this page.

There is nothing more aggravating when you just don t know what size drill bit to use for a pilot. Size 8 1 8 inches. Size 12 5 32 inches. Pilot hole sizes for metal screws and wood screws posted 30 january 2010 at 9 43pm by michael chu filed under.

Material thickness inch nominal screw size diameter tpi. Self tapping screws sheet metal. Inch approx us gauge material 020 055 26 17 diameter 061 122 16 11 diameter 125 245 11 3 diameter 250 312 3 5 16 diameter 313 500 5 16 1 2 diameter. Step 4 drill correctly.

Your pilot hole drill bit size will depend on the size of your sheet metal screw. Drill size hole diameter nominal screw size number of threads per inch 6 18 7 16 8 15 10 12 12 11 14 10 20 9 24 9 32 30 29 21 3 16 5 5mm l 11 32 1160 1285 1360 1590 1875 2165 2900 3438 drill size hole diameter suggested hole sizes for types ab b 25 hole size hole size suggested hole sizes for types a. Machined countersinks are created with a drill press and formed countersinks are made with punch press tooling the best option depends on your project and part geometry. Screw size hard wood soft wood countersink size.

Sheet metal screws. 7 64 5 64 3 32 1 16 1 4 4. Pilot hole drill bit size chart for wood screws january 27 2019 handtools 0 tools. When working with brass wood screws.

Size 14 1 4 inches 3 16 inches. Wood screw pilot hole sizes. To help my readers out i thought i would add this quick reference chart. 5 32 7 64 9 64 3 32 5 16.

Size 10 9 64 inches. Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. Size 6 7 64 inches. A size 4 screw should have a pilot hole drill size of 3 32 inches.

Life while installing shelving in my home i had to drill pilot holes for 8 and 12 metal screws into studs. 1 8 3 32 7 64 5 64 5 16 6. Tapered bit straight bit tapered bit straight bit 2. However there are times when sheet metal screws are required.

3 32 1 16 5 64 1 16 1 4 3. 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. And 5 16 inches 1 4 inches.