210pcs/410 Stainless Steel Cross Head Washer Self Drilling Screws, M4.2 Large Flat Head Self Tapping Self Drilling Screws, Self

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410 Washer self-tapping screws combine high strength, corrosion resistance, and easy installation, making them an ideal choice for applications such as sheet metal, steel structures, electrical equipment, and building curtain walls. Their integrated washer design combines the flat washer and screw into one, eliminating the need for additional washers during installation, streamlining installation and improving efficiency. The self-tapping design allows for direct penetration into sheet metal, aluminum profiles, or plastics for quick tightening, making them widely used in applications such as pre-painted steel panels, ventilation ducts, and electrical enclosures.