Small Parts 37245W Steel Thread Cutting Screw, Zinc Plated Finish, Hex Washer Head, Type 25, 3/8"-12 Thread Size, 1-1/2" Length (Pack of 10)

The steel thread cutting screw has a zinc plating, a Type 25 point style, and a hex washer head. The screw, also called a type BT thread cutting screw, has coarse threads and is suitable for use with plastics and other soft materials. The type 25 point tapers down to a blunt edge and directs chips out of the hole to prevent clogging. The large cutting surface enables screw installation with minimal rotating force. 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.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 25 point has coarse threads that taper down to a blunt edge with a large cutting surface, provides excellent chip clearance, and is suitable for use in plastics and other soft materials
• 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 and has six flat sides that a wrench can grip to turn from the side