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The steel thread cutting screw has a black oxide finish, a Type F point style, and a hex washer head. The type F point is suitable for heavy gauge sheet metal, aluminum, cast iron, brass, and plastic. The screw has machine screw threads that taper down to a blunt point with multiple cutting edges and chip cavities. Steel is often used in applications where strength is the primary consideration. The black oxide finish offers mild corrosion resistance and lubricity. 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 flange acts like a washer to increase the fastener's bearing surface and distribute the clamping force over a larger area, providing grip and reducing damage to mating surfaces.
Thread cutting and thread rolling screws, two types of self-tapping screws, are threaded fasteners that create a mating thread in the wall of a hole. The two screws differ from each other in the way that they create the threads. Thread cutting screws cut the wall of the hole to create the thread, creating material chips that need to be cleared away from the hole to prevent clogging. Thread rolling screws, also called thread forming screws, do not remove material but instead press against the wall of the hole to displace the material and form the threads.
Tuxydoh
Reviewed in the United States on September 21, 2023
They do the job as intended
Matt
Reviewed in the United States on September 8, 2022
These worked OK for the most part. They seem a little brittle Plan on using a ratchet or wrench and plenty of cutting oil to install them. They do not work so well with an impact installing them. Not even my small M12 Milwaukee impact. Snapped a couple off before I got the procedure down. Need a size #7 or 13/64” drill bit to get the proper size hole.
JUGA7
Reviewed in the United States on July 26, 2022
If you work on vehicles it is a good idea to have a stash of screws handy.
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