Hex Head Self-drilling Screw with Washer

About this product

Model: SIP Specification: M2.9-M6.3 X 13mm - 100mm

Self-drilling screws have tap-like flute in the leading threads, there is also a preliminary drill-like fluted tip that looks much like the tip of a center drill. These screws combine a thrilling-like action and the fastener installation itself into only one driving motion (instead of separate drilling, tapping, and installing motions); they are thus very efficient in a variety of hard-substrate applications, from assembly lines to roofing. (Quote from Wikipedia)