SUNKIN Self Tapping Screws for Metal

A set of high-performance self-tapping metal screws engineered for fast, secure fastening without the need for pre-drilling, ideal for construction, roofing, solar panel installation, and general metal-to-metal applications. Made from corrosion-resistant 304 stainless steel with a hardened alloy steel drill tip, they combine durability and drilling efficiency for reliable penetration into mild steel and aluminum surfaces. The bi-metal construction enhances strength, reduces breakage, and improves heat resistance during installation. Featuring a 5/16" hex washer head design, they deliver strong torque transfer with reduced cam-out, ensuring stable and efficient fastening. Designed for both professional and DIY use, they provide a time-saving and versatile solution for structural and industrial assembly work.