Self Drilling Screws are sheet metal screws and do not require pre-drilling. The screw will do the drilling & tapping.

Carbon Steel Self Drilling Screws come with different drilling capacity and are available with Ruspert or Tufcote coating

Stainless Steel Self Drilling Screws are called Bi-Metal because they are made of two different metals:

• The head & threaded part is made of stainless steel
• The drill bit is made of carbon steel and is welded thru a unique process to the threaded part

Bi-Metal screws are Tufcote coated to protect the carbon steel drill bit from corrosion.