410 Stainless Steel Tek Screws are a self drilling screw. Made from 410 stainless steel so that the drill point is hard enough to keep it's drill point. Used primarily for use in Aluminum.
The most popular head styles are:
- Hex Washer Head Tek Screws 410 Stainless Steel
- Pan Phillips Head Tek Screw 410 Stainless Steel
- Flat Phillips Head Tek Screw 410 Stainless Steel
Grade 410 Bright Hardened Stainless Steel used in self-drilling (Tek) screws intended for steel substrates is a Martensitic alloy containing 12% chromium but no nickel. It is therefore somewhat less resistant to corrosive attack than the 300 Series grades.
The reason for this is 300 series isn't hard enough to keep a drill point. It is magnetic and is hardenable by heat treatment which gives it the mechanical properties necessary to penetrate most metallic materials. It is recommended that these fasteners be used in thinner material. These fasteners are most popular for use in Aluminum.