How to pick Self Tapping Screws

11/17/2023

        Self tapping screws are a versatile fastening solution widely used in various industries and applications. This article aims to explore the different types and sizes of self tapping screws, highlighting their unique features and applications.

1. Thread Types:Self tapping screws come in different thread types to suit specific materials and applications. The most common thread types include:
a. Coarse Thread: Coarse thread screws have a larger pitch and are suitable for soft materials like wood and plastic. They provide quick installation and good holding power.
b. Fine Thread: Fine thread screws have a smaller pitch and are ideal for harder materials such as metal and alloy. They offer better thread engagement and higher pull-out resistance.
c. Hi-Lo Thread: Hi-Lo feature alternating high and low threads, enabling them to tap into a wide range of materials, including thin sheets and brittle materials.
2. Head Types:Self tapping screws are available in various head types, each offering unique advantages for specific applications:
a. Flat Head: Flat head have a countersunk shape, allowing them to sit flush with the surface when fully installed. They provide a neat and finished appearance.
b. Pan Head: Pan head have a rounded top surface and are commonly used in applications where a raised head is required for easy tightening and removal.
c. Hex Head: Hex head feature a hexagonal-shaped head, providing a larger gripping surface for better torque transmission and reduced risk of stripping.
d. Truss Head: Truss head have a low-profile dome-shaped head, offering a larger bearing surface and improved load distribution.
3. Size and Length:
Self tapping screws are available in a wide range of sizes and lengths to accommodate different thicknesses of materials. The sizes are typically specified by their thread diameter and pitch, while the length is measured from the underside of the head to the tip of the screw. It is crucial to select the appropriate size and length to ensure proper thread engagement and optimal fastening performance.

        Self tapping screws offer a convenient and efficient solution for fastening in various materials. By understanding the different types and sizes available, as well as their unique features and applications, it becomes easier to select the most suitable self tapping screws for specific projects.

https://www.hzfastener.com/product-category/screws/self-tapping-screw/