1/4-20 x 0.75 in. Self Tapping Hex Washer Head Screw - AndyMark, Inc
Screw | machine component | Britannica
Amazon.com: Sheet Metal Self Tapping Screws Assortment Screws Metal Sheet Stainless Steel Sheet Metal Epoxy Head Washer Self Drilling Tek Screw Set #8 x 5/8" (100 Pcs) Super-Deals-Shop : Industrial & Scientific
What's the Difference Between Self-Drilling and Self-Tapping Screws?