Sheet Metal Pilot Hole Size Chart

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.

Sheet metal pilot hole size chart.

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. Wood screw pilot hole sizes. Pilot hole drill bit size chart for wood screws january 27 2019 handtools 0 tools. To help my readers out i thought i would add this quick reference chart.

5 32 7 64 9 64 3 32 5 16. 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. 7 64 5 64 3 32 1 16 1 4 5. Size 8 1 8 inches.

Size 12 5 32 inches. Print this page. 3 32 1 16 5 64 1 16 1 4 3. Your pilot hole drill bit size will depend on the size of your sheet metal screw.

However there are times when sheet metal screws are required. Screw size hard wood soft wood countersink size. Step 4 drill correctly. 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. When working with brass wood screws. Self tapping screws sheet metal. There is nothing more aggravating when you just don t know what size drill bit to use for a pilot.

Sheet metal screws. Material thickness inch nominal screw size diameter tpi. If you re working with brass screws go up 1 size as well to accommodate the softer metal. 1 8 3 32 7 64 5 64 5 16 6.

Tapered bit straight bit tapered bit straight bit 2. Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. Pilot hole sizes for metal screws and wood screws posted 30 january 2010 at 9 43pm by michael chu filed under. This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.

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. Lo driv tri round recommended pilot holes sizes inch screws. 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. Size 10 9 64 inches.

And 5 16 inches 1 4 inches. 7 64 5 64 3 32 1 16 1 4 4. 9 64 7 64 1 8 3 32 5 16 7.