How To Size Sheet Metal Screws

If you have some stray screws and bolts a k a.

How to size sheet metal screws.

8 x 1 2 8 x 3 4 8 x 1 by jetovo 12 99 12. These screws are also available in stainless steel and also in zinc plated. Decimal nearest fractional 4 112. Their heads can be either phillips head or slotted head.

Print this page. If the screw size includes a dash with a number following it that is the number of threads per inch tpi. Us sheet metal screw diameters. The engineered drill point and flute remove material efficiently and properly size the hole for threads.

Types a and ab which have a standard point and blunt point type b are common sheet metal screws. 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. For example 5 0 means the screws have a diameter of 5 mm. Types a and ab are usually considered interchangeable.

Regardless of the material the driving point needs to be larger than the depth of the material being driven into. The diameter refers to the major diameter or outside edge of the threads. Screws with a diameter smaller than 1 4 have a nominal size indicated by a number e g. The oval head types of sheet metal screws resemble the regular flat head screws but have slight variation.

1 4 and larger diameters are shown as inches. Jetovo 150 pack 410 stainless steel wafer head phillips self drilling screws sheet metal tek screws assortment kit modified truss head self driller size. If you re buying screws with the measurements listed on the packaging in the metric system then the first number represents the diameter. Hex head roofing screws teks 9 x 1 1 2 in.

These rivets feature more girdles on top which help in providing a more finished appearance. 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. Consequently burrs are common. This is how the diameter is represented for screws in the metric system.

Teks 9 x 1 1 2 in.