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The steel self-drilling screw with zinc plating has a serrated hex washer head and a hex drive. Steel is often used in applications where strength is the primary consideration. The zinc plating offers corrosion resistance and has a reflective appearance. The hex washer head has six flat sides that a wrench can grip to turn from the side, enabling use when there is no space above the head for a screwdriver. The serrated flange acts like a washer to increase the fastener's bearing surface and distribute the clamping force over a larger area, providing a grip that resists loosening.
Self-drilling screws, a type of self-tapping screw, are threaded fasteners that drill their own hole and thread it as they are installed. Usually only recommended for use with metal, self-drilling screws are available with wings that enable use when fastening wood to metal. The drill point length should be long enough to penetrate both materials being fastened before the threading portion reaches the material.
Customer
Reviewed in the United States on January 7, 2025
They seem to be of good quality for metal roofing
M. M.
Reviewed in the United States on April 1, 2025
These match the hardware that was used on our garage door
DanG
Reviewed in the United States on September 11, 2024
Worked fine to hold some D-Rings for my van walls.
Customer
Reviewed in Canada on August 7, 2023
fast used only one power drill
Amy
Reviewed in the United States on August 22, 2023
Work for me, in sheet metal.
Jan
Reviewed in the United States on October 27, 2023
Self tapping worked good.Drilling was something hard but only wasted 2 of 10 when bit dulled.
Jawanda
Reviewed in Canada on February 4, 2021
best quality product.
Gail Dominicis
Reviewed in the United States on April 13, 2021
Self drilling tapping screws
Samuel Kim
Reviewed in the United States on January 21, 2019
Easy nail to metal panel. Good to work.
Crazycharlie
Reviewed in the United States on January 31, 2017
Quick metal cutting screws with an integrated locking base, perfect for cutting through steel to attach whatever. I used them to cut through the bed of my truck to attach Undercover Swing boxes that I had removed from my last truck. You cannot find these same cutters in any hardware store that I have searched around my area. Great product!
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