Sheet Metal Pilot Hole Size Chart

Self tapping screws sheet metal.

Sheet metal pilot hole size chart.

Size 14 1 4 inches 3 16 inches. 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. 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. Screw size hard wood soft wood countersink size.

Sheet metal countersink chart choose from a variety of standard countersink options which can either be formed or machined into sheet part parts. 7 64 5 64 3 32 1 16 1 4 4. To help my readers out i thought i would add this quick reference 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.

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. Pilot hole drill bit size chart for wood screws january 27 2019 handtools 0 tools. A size 4 screw should have a pilot hole drill size of 3 32 inches.

9 64 7 64 1 8 3 32 5 16 7. Tapered bit straight bit tapered bit straight bit 2. 5 32 7 64 9 64 3 32 5 16. Wood screw pilot hole sizes.

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. When working with brass wood screws. Size 12 5 32 inches. This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.

3 32 1 16 5 64 1 16 1 4 3. Material thickness inch nominal screw size diameter tpi. Size 8 1 8 inches. If you re working with brass screws go up 1 size as well to accommodate the softer metal.

Sheet metal screws. 7 64 5 64 3 32 1 16 1 4 5. Step 4 drill correctly. Lo driv tri round recommended pilot holes sizes inch screws.

Pilot hole sizes for metal screws and wood screws posted 30 january 2010 at 9 43pm by michael chu filed under. Print this page. 1 8 3 32 7 64 5 64 5 16 6. 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. And 5 16 inches 1 4 inches. 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.