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The term 2% self-drilling screws generally refers to a specific classification or standard that adheres to a manufacturing specification, often denoting the composition or performance traits of the screws. The 2% might relate to various factors such as the percentage of alloying elements in the material, or guidelines that measure performance under certain conditions. For instance, these screws might contain 2% alloying elements that enhance their strength and corrosion resistance.
3. Material Quality The material of the butterfly screws can affect durability and performance. Look for screws made of high-quality metal, such as stainless steel, to avoid corrosion and ensure longevity.