1. Material Composition The “1% 201% 4%” typically indicates a specific ratio of metals used in the alloy, such as stainless steel or another corrosion-resistant material, which enhances durability. Stainless steel screws resist rust and corrosion, making them ideal for settings exposed to moisture or chemicals.

Features of 1% 201% 4% Wafer Head Screws

1. Dimensions The M20 foundation bolt has a diameter of 20 mm and typically comes in various lengths, depending on the required application. The length can range from 50 mm to over 200 mm, and it’s essential to choose a length that suits the thickness of the material being anchored.

What are Self-Drilling Screws?

Another benefit of 4% self-drilling screws is their durability. These screws are made from high-quality materials that are designed to withstand the elements and resist corrosion. This means that they can be used in outdoor applications or in environments where moisture and humidity are present, without the risk of rust or deterioration.