How To Size Sheet Metal Screws

Regardless of the material the driving point needs to be larger than the depth of the material being driven into.

How to size sheet metal screws.

Print this page. If you re buying screws with the measurements listed on the packaging in the metric system then the first number represents the diameter. These screws are also available in stainless steel and also in zinc plated. Jetovo 150 pack 410 stainless steel wafer head phillips self drilling screws sheet metal tek screws assortment kit modified truss head self driller size.

Hex head roofing screws teks 9 x 1 1 2 in. The oval head types of sheet metal screws resemble the regular flat head screws but have slight variation. Types a and ab which have a standard point and blunt point type b are common sheet metal screws. These rivets feature more girdles on top which help in providing a more finished appearance.

8 x 1 2 8 x 3 4 8 x 1 by jetovo 12 99 12. The engineered drill point and flute remove material efficiently and properly size the hole for threads. Screws with a diameter smaller than 1 4 have a nominal size indicated by a number e g. Us sheet metal screw diameters.

Hex head roofing screws provide secure metal to metal fastening with strong holding power without the need to pre drill. Consequently burrs are common. Types a and ab are usually considered interchangeable. If the screw size includes a dash with a number following it that is the number of threads per inch tpi.

Their heads can be either phillips head or slotted head. Decimal nearest fractional 4 112. This is how the diameter is represented for screws in the metric system. Sheet metal screws were originally designed for metal like for use in a b vent pipe but can be used for a number of other applications too they can be used with plastics rubber or plywood.

Fasteners lying around and aren t quite sure what size they are or if you need to replace a missing bolt on a piece of machinery and need to know what size to get here are some methods to easily figure that out. 1 4 and larger diameters are shown as inches. If you have some stray screws and bolts a k a. The diameter refers to the major diameter or outside edge of the threads.

Sizes typically range from 2 to 3 8.