Type A: Located on Sheet Metal (Tapping) ScrewsType A tapping screws feature coarse threads and gimlet points. They are utilized in thin metal, resinous plywood, and different composite boards.
Type AB: Used for Sheet Metal Screws with Tapping Type AB tapping screws feature spaced threads and gimlet points, making them suitable for thin metal, resinous plywood, and different composite boards. Unlike Type A screws, Type AB screws have a broader range of applications.
Type B: Located on Sheet Metal (Tapping) ScrewsType B tapping screws feature spaced threads and a blunt point with incomplete entering threads. They are specifically designed for use in thin metal, nonferrous castings, resinous plywood, plastics, and different composite boards.
Type 25: Discovered on Thread Cutting Screws Type 25 screws, also recognized as Type BT, feature spaced, incomplete tapered threads with a blunt point and tapered entering edges. They include one or more cutting edges and chip removal indentations, and are commonly utilized in plastic, asbestos compositions, and other composites.
Type F: Commonly Found on Thread Cutting Screws Type F screws feature machine screw threads, a blunt point, tapered entering edges, and one or more cutting edges with chip removal indentations. They are typically utilized in nonferrous castings, steel sheets, plastics, brass, cast iron, and similar materials.
Type 23: Discovered in Thread Cutting Screws Also referred to as Type T, Type 23 screws feature machine screw threads with a blunt point and tapered entering edges, along with one or more cutting edges and chip removal indentations. They share similarities with Type F screws in this aspect. Nevertheless, the cutting edge on the point is wider and deeper compared to Type F screws. Type 23 screws are commonly utilized in nonferrous castings, steel sheets, plastics, brass, cast iron, and other materials.
Type 17: Discovered in Thread Cutting Screws Type A designed specifically for wood, featuring a coarse tapping screw thread and a uniquely long sharp point with flutes to gather wood chips. The standard is one flute but some people require more.
Teks screws: a.k.a. self-drilling screws, are capable of creating their own hole in thin sheet metal, as well as heavier gauge metals and various other materials. These screws then create closely fitting threads within the hole. Teks screws are particularly suitable for automated assembly processes and can help minimize or even eliminate the necessity for drill bits or taps. After drilling the hole, Teks screws (self-drilling screws) proceed to tap the hole in a similar manner to thread forming or thread cutting screws in a pre-drilled hole. Additionally, they are specifically designed to prevent the accumulation of paint, weld flash, or any other foreign materials that might be present in pre-drilled or pre-punched holes.
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