Sheet Metal Pilot Hole Size Chart

Sheet metal screws.

Sheet metal pilot hole size chart.

Wood screw pilot hole sizes. Lo driv tri round recommended pilot holes sizes inch screws. 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.

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 drill bit size chart for wood screws january 27 2019 handtools 0 tools. 3 32 1 16 5 64 1 16 1 4 3. There is nothing more aggravating when you just don t know what size drill bit to use for a pilot.

Size 10 9 64 inches. Size 12 5 32 inches. Size 14 1 4 inches 3 16 inches. Print this page.

5 32 7 64 9 64 3 32 5 16. Life while installing shelving in my home i had to drill pilot holes for 8 and 12 metal screws into studs. 9 64 7 64 1 8 3 32 5 16 7. 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.

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. Self tapping screws sheet metal. Screw size hard wood soft wood countersink size. 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.

When working with brass wood screws. Your pilot hole drill bit size will depend on the size of your sheet metal screw. To help my readers out i thought i would add this quick reference 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.

1 8 3 32 7 64 5 64 5 16 6. If you re working with brass screws go up 1 size as well to accommodate the softer 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. 7 64 5 64 3 32 1 16 1 4 5.

However there are times when sheet metal screws are required. 7 64 5 64 3 32 1 16 1 4 4. A size 4 screw should have a pilot hole drill size of 3 32 inches. And 5 16 inches 1 4 inches.

Material thickness inch nominal screw size diameter tpi. Pilot hole sizes for metal screws and wood screws posted 30 january 2010 at 9 43pm by michael chu filed under. Step 4 drill correctly.