Sheet Metal Pilot Hole Size Chart

Sheet metal screws.

Sheet metal pilot hole size chart.

Clearance hole chart for inch bolts and screws according to asme b18 2 8. 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. There is nothing more aggravating when you just don t know what size drill bit to use for a pilot. To save you time our quick reference chart above will tell you which drill bit to use for a given screw size.

To help my readers out i thought i would add this quick reference chart. However there are times when sheet metal screws are required. Thus drilling pilot holes will help you save on the materials cost and offer a better appearance to your final product. Inch approx us gauge material.

Self tapping screws sheet metal. This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit. Life while installing shelving in my home i had to drill pilot holes for 8 and 12 metal screws into studs. 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.