Self Tapping Screws / Sheet Metal Screws

Self-tapping screws, including sheet metal screws, are designed to create their own threads as they are driven into a material, eliminating the need for pre-drilled holes in many applications. This makes them ideal for quick and efficient fastening in a variety of materials, from sheet metal and wood to plastics and thin metals.   

AFT Fasteners offer a wide range of self-tapping screws, each tailored to specific materials and applications. A key differentiating factor is the point style, which dictates the screw's drilling and threading capabilities:

Type A: These screws feature a sharp, gimlet point and widely spaced threads. They are best suited for thin sheet metal, light-gauge steel, and non-ferrous metals.   
Type B: Characterized by a blunt point and finer threads, Type B screws are designed for thicker sheet metal, plastics, and softer metals. They offer improved holding power in these materials.
Type AB: Combining the features of Type A and Type B, Type AB screws offer versatility across a broader range of materials. Their sharp point facilitates easy starting, while the finer threads provide secure fastening in various thicknesses of sheet metal and other materials.   
Self-Piercing/Sharp Point: These screws have a very sharp, drill-like point that can pierce through thin materials without pre-drilling. They are ideal for rapid assembly in sheet metal and light-gauge steel applications.   
Type 17: Also known as "auger point" screws, Type 17 screws feature a notched or fluted point that acts as a drill bit. They are commonly used in woodworking and softer materials, as the notch helps to clear debris and reduce splitting. These are less common within strictly sheet metal applications, but can be used in some cases where a thicker material is being used, or when fastening sheet metal to wood.

Whether you're working on automotive repairs, HVAC installations, or general construction projects, understanding the different point styles of self-tapping screws, particularly sheet metal screws, will ensure you select the right fastener for a strong and reliable connection.

Self Tapping Sheet Metal Screws - Points - Type A, AB & B

Frequently Asked Questions

What is the difference between a self tapping screw and a sheet metal screw?

It's easy to see how there can be some confusion between "self-tapping screws" and "sheet metal screws," as they are very closely related. Here's a breakdown to clarify the difference:

Self-Tapping Screws:

  • This is a broad category. It refers to screws that can create their own threads as they are driven into a material.  
  • They are designed to eliminate the need for pre-tapping (creating threads in a pre-drilled hole).  
  • Self-tapping screws can be used in various materials, including sheet metal, wood, and plastic.  
  • Therefore, a sheet metal screw is a type of self tapping screw.

Sheet Metal Screws:

  • These are a specific type of self-tapping screw designed primarily for use in sheet metal.
  • They come in various point styles (like Type A, Type AB, and Type B) that are optimized for working with thin metal.  
  • So, all sheet metal screws are self-tapping, but not all self-tapping screws are sheet metal screws.

"Self-tapping" is the general term.
"Sheet metal" is a more specific term, indicating the intended material.
Therefore when you hear the term sheet metal screw, it is safe to assume it is a type of self tapping screw.

What is the difference between a self tapping screw and a self drilling screw?

The key difference between self-tapping and self-drilling screws lies in their ability to create a hole:

Self-Tapping Screws:

  • These screws are designed to tap their own threads into a material.  
  • They often require a pre-drilled pilot hole, especially when used in harder materials like metal.  
  • They excel at forming threads in existing holes.

Self-Drilling Screws:

  • These screws go a step further by drilling their own pilot hole and tapping the threads in a single operation.
  • They have a drill-bit-like point that eliminates the need for pre-drilling.  
  • They are particularly useful for working with metal, where pre-drilling can be time-consuming.
  • They are also often referred to as "Tek Screws".   

Here's a simplified breakdown:

  • Self-tapping: Taps threads, may need a pilot hole.  
  • Self-drilling: Drills and taps, no pilot hole needed.  
  • Essentially, a self-drilling screw is a more advanced type of self-tapping screw.

What is a self tapping screw?

Self-tapping screws are screws designed to create their own threads as they are driven into a material, eliminating the need for pre-drilled holes in many applications. This makes them ideal for quick and efficient fastening in a variety of materials, from sheet metal and wood to plastics and thin metals.