Pilot Drill Size For Sheet Metal Screws

Inch approx us gauge material.

Pilot drill size for sheet metal screws.

To counterbore for striking head. Life while installing shelving in my home i had to drill pilot holes for 8 and 12 metal screws into studs. To help my readers out i thought i would add this quick reference chart. Self tapping screws sheet metal.

A size 4 screw should have a pilot hole drill size of 3 32 inches. Size 10 9 64 inches. With that being said you may need to go up more sizes depending on other factors. 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.

It is important that the correct hole size is used and the recommendation below should be followed but if very hard material is being used a hole size slightly larger may have to be used and in very soft material a smaller hole. Twist bit nearest size in fractions of an inch. In a single time saving operation these screws drill tap and fasten. Types ab b self tapping screws in mild steel brass aluminium alloy stainless steel and monel sheet metal.

Size 8 1 8 inches. There is nothing more aggravating when you just don t know what size drill bit to use for a pilot. Your pilot hole drill bit size will depend on the size of your sheet metal screw. Lo driv tri round recommended pilot holes sizes inch screws.

Sizes of 4 40 to 3 8 16 are common. Sheet metal screws 100 our trucks deliver throughout se sw florida to place an order please call customer service at 1 800 226 5555 or fax to 800 582 6110 nominal screw size number of threads per inch 2 32 3 28 4 24 5 20 6 20 7 19 8 18 10 16 12 14 1 4 14 5 16 12 3 8 12 48 46 44 36 32 30 29 21 3 16 5 5mm i 21 64 0760 0810 0860 1065 1160 1285. And 5 16 inches 1 4 inches. No of auger bit.

Bit or drill sizes. Drill gauge no or letter to be used for maximum holding power. Material thickness inch nominal screw size diameter tpi. This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit.

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. Size 6 7 64 inches. Self drilling screws also called teks have a tip that resembles a drill and often have spaced threads like sheet metal screws.

For instance a non tapered brass screw that s size 6 would use 3 32 drill bit for softwood 7 64 drill bit for hardwood. That allows for us to accommodate both the softer material and the non tapered screw tip. Size 14 1 4 inches 3 16 inches. However there are times when sheet metal screws are required.

Do not use self drilling screws in blind holes holes that do not pass through the material.