HeBei Delong Fastener Manufacturing Co.,Ltd

Self-drilling screws have a drill tip that eliminates separate drilling and tapping operations, enabling faster and more economical installation. The drill point allows these drill screws to be mounted into a steel substrate up to 1/2" thick. Self-drilling screws are available in a variety of head styles, thread lengths, and groove lengths for screw diameters #6 to 5/ 16"-18.
Compared with ordinary screws, self-drilling screws have higher toughness and maintenance power, and will not loosen for a long time after combination. Using, safe drilling, tapping once completed, simple operation. So, while ordinary machine screws can't tap their own holes in metal substrates, self-drilling roof screws can(within reasonable limits for substrate hardness and depth). Hex washer head self-drilling screws, hexagonal roof screws, self-drilling screws

DL Fasteners offers self-drilling hex washer head screws for any type of building or construction work. Hex washer head self-drilling screws are best used to secure metal parts or attach thin metal plates to wood surfaces. All our hex flange head self-drilling screws are fully threaded to ensure better safety and weight distribution