Self Drilling Screws
Self-Drilling Screws (aka TEK screws) are manufactured with a "drill-bit" tip that eliminates the need for pre-drilling most applications. This allows the screw to form mating threads and produce a complete fastening system in one operation. Fastener SuperStore offers more than 2,300 distinct size and style combinations in our self drilling screw selection, including BSD (coarse thread) and CSD (fine or machine screw thread) styles. We stock the tiniest (#2) sizes all the way up to the largest: 5/16's and 3/8's diameter screws.