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The 18-8 stainless steel thread cutting screw has a plain finish, a Type F point style, and a hex washer head with a slotted drive. 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. The 18-8 stainless steel material provides strength and offers good corrosion resistance in many environments. The material may be slightly magnetic. 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. The slotted drive has a linear slot for use with a flat-blade driver.
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.
Electrika
Reviewed in the United States on October 27, 2017
I used these to sandwich a PC case fan inbetween two radiators in my small Micro ATX case (Corsair Air 240). The only space in which I could fit the GPU (MSI 1080 Sea Hawk - also uses a Corsair) radiator was toward the center, behind the 240mm Corsair H105 radiator mounted to the front intake section of the case.These screws are the correct size and length to allow mounting from the interior corners of a 120mm case fan outward to a radiator, and so the fan I used has 8 screws in total - 4 to each radiator. Be mindful that you may need to go through a variety of case fans to find one that actually has space for the screws to be positioned - several of the spares I have available have plastic that gets in the way and wouldn't work without some modification.*Make sure you have a small enough wrench to fit into the interior fan space*So far so good, everything is rock solid and cooling just fine in my little system!
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