The steel thread cutting screw has a zinc plating, 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. 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 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. Thread cutting screw with type F point has machine screw threads that taper down to a blunt edge and is suitable for heavy gauge sheet metal, aluminum, cast iron, brass, and plastic Steel is often used in applications where strength is the primary consideration Zinc plating resists corrosion and has a reflective appearance Hex washer head has a flange for additional grip with the mating surface Slotted drive has a linear slot for use with a flat-blade driver ASIN B00GX0WVK8 Brand Small Parts Color zinc Model 3712FSW Set Name Pack of 10 Head Type Hex Size Name 3/8 -16 Metal Type Alloy Steel Unit Count 10 Count Item Weight 0.27 g Part Number 3712FSW Thread Size 3/8 -16 Thread Type Un Drive System Slotted Finish Types Zinc Plated Manufacturer Small Parts Thread Class Machine Screw Threads Thread Style Right Hand Fastener Size 3/8 in x 3/4 in Fastener Type Machine Screw Item Diameter 0.38 inches Material Type Steel Exterior Finish Zinc Item Dimensions 0.75 inches Number Of Items 10 Thread Coverage Fully Threaded Number of Pieces 10 Outside Diameter 0.38 inches Screw Head Style Flanged Hex Screw Point Style Type F Point Set Screw Thread Type Unified National Compatible Groove Diameter 0.38 inches