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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.
Millermatic
Reviewed in the United States on August 2, 2023
Bought these as a replacement for my miller welder/generator. They work perfect
TJ
Reviewed in the United States on May 30, 2023
It is a self tapping bolt, not much else to say really or is there? Yes.They arrived quick, great price.The finish is a flat dry industrial black that looks great.The self tapping feature worked well (be sure to use the right drill hole size, a little larger than the core diameter)Once installed they still hold tight even months later.Have also used them in non-self tapping applactions with good results.Would buy again or others like them when needed.
Jay Rupereaux
Reviewed in the United States on May 18, 2023
I can’t remember where I put them after I received them!🤔
Rick B.
Reviewed in the United States on October 15, 2023
very hard to find this style bolt they work good
Robert
Reviewed in the United States on December 17, 2022
Great cutting in 1/8 and 1/4 inch aluminum and very strong holding power. Use thread lubricant for cleaner cutting and slow speed on impact driver for best results.
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