Pilot Drill Size For Sheet Metal Screws

Self tapping screws sheet metal.

Pilot drill size for sheet metal screws.

For shank clearance holes. Lo driv tri round recommended pilot holes sizes inch screws. Size 14 1 4 inches 3 16 inches. Bit or drill sizes.

Life while installing shelving in my home i had to drill pilot holes for 8 and 12 metal screws into studs. Twist bit nearest size in fractions of an inch. Self drilling screws also called teks have a tip that resembles a drill and often have spaced threads like sheet metal screws. Types ab b self tapping screws in mild steel brass aluminium alloy stainless steel and monel sheet metal.

Your pilot hole drill bit size will depend on the size of your sheet metal screw. There is nothing more aggravating when you just don t know what size drill bit to use for a pilot. That allows for us to accommodate both the softer material and the non tapered screw tip. 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.

With that being said you may need to go up more sizes depending on other factors. Drill gauge no to be used for. Size 12 5 32 inches. 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.

Inch approx us gauge material. However there are times when sheet metal screws are required. To help my readers out i thought i would add this quick reference chart. Size 8 1 8 inches.

Size 6 7 64 inches. Drill gauge no or letter to be used for maximum holding power. This should help whenever you run into a situation you need to drill a pilot hole and are not sure the size bit. Do not use self drilling screws in blind holes holes that do not pass through the material.

To counterbore for striking head. Sizes of 4 40 to 3 8 16 are common. Material thickness inch nominal screw size diameter tpi. A size 4 screw should have a pilot hole drill size of 3 32 inches.

Size 10 9 64 inches. Twist bit nearest size in fractions of an inch. In a single time saving operation these screws drill tap and fasten. 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.