Do you know how sheet metal screws are measured? Sheet metal screws are threaded fasteners designed for use with sheet metal. They feature a pointed tip, a fully threaded shank and a head. Using them, you can fasten sheet metal and related components. If you’re planning to use sheet metal screws, however, you’ll need to choose the right size.
Type
The type will provide insight into the size of a sheet metal screw. Like all screws, sheet metal screws are available in different types. Type A sheet metal screws are characterized by coarse threads, whereas type AB sheet metal screws are characterized by fine threads. In other words, the threads on type AB sheet metal screws are thinner than the threads on type A sheet metal screws.
Gauge
You should consider the gauge when choosing sheet metal screws. Also known as major diameter, the gauge represents the outer diameter of the threads. It represents the width of the shank from the widest part (the outer diameter of the threads).
Gauges can range from 0 to 14. A 0-gauge sheet metal screw is 0.06 inches in diameter, whereas a 14-gauge sheet metal screw is .24 inches in diameter. The higher the gauge, the wider the sheet metal screw.
Length
Don’t forget to check the length when choosing sheet metal screws. The gauge only reveals how wide a sheet metal screw is; the gauge doesn’t reveal its length.
Some sheet metal screws are longer than others. You can refer to the length to determine the length of a sheet metal screw. It may use inches, or it may use millimeters. Regardless, the length will reveal how long the sheet metal screw is.
Other Considerations
You can find sheet metal screws in different materials. Some of them are made of stainless steel or carbon steel. Other sheet metal screws are made of brass.
Sheet metal screws are available in different head types. The head type refers to the shape or style of the head. Common head types for sheet metal screws include truss, hex, flat and pan.
The drive type may vary as well. Common drive types for sheet metal screws include Phillips, hex, star and slotted.
In Conclusion
By taking into account the type, gauge and length, you’ll have an easier time choosing the right sheet metal screws. The type will reveal whether a sheet metal screw has fine or coarse threads, the gauge will reveal the width of a sheet metal screw. Finally, the length will reveal how long it is.
