#8-18 X 3" SELF DRILLING SCREWS: These professional-grade fasteners feature a Phillips bugle head design with a #2 point, specifically engineered to drill through materials and create secure fastenings in one continuous motion. The integrated self-drilling tip functions as its own drill bit, cutting through sheet metal without any pre-drilling preparation. This design speeds up installation, removes the need to swap bits, reduces misalignment, and offers deep penetration for thick materials. VERSATILE DUAL-PURPOSE FASTENING: Expertly crafted for fastening sheet metal to both wood and metal substrates, these self drilling screws excel in diverse applications from HVAC ductwork and metal roofing to structural steel framing and equipment mounting. These versatile long screws eliminate the need to stock separate inventories of wood screws and metal screws. The sharp threads grip wood securely, while the self-drilling screws point cleanly penetrates metal without slipping. LOW CARBON STEEL CONSTRUCTION: These self drilling screws are manufactured from premium low carbon steel with a protective zinc plated finish, these long screws deliver the ideal balance of strength and flexibility for demanding fastening applications. The high ductility prevents brittle failure under workload, while the material inherent toughness resists thread stripping and shank breakage. The zinc coating resists rust, improves lubricity for smoother driving, and extends the screw lifespan. PHILLIPS BUGLE HEAD SCREW DESIGN: The bugle-shaped head profile is specifically engineered to sit flush with or slightly below the material surface, creating a clean, professional finish that won't snag or protrude. The countersinking design lets sheet metal panels sit flush and prevents interference with overlapping materials. The Phillips #2 drive ensures strong bit grip, excellent torque transfer, and smooth, controlled driving with less cam-out. QUALITY PACK OF 100: This economical pack contains 100 high-quality self-drilling screws with complete manufacturer traceability, providing documentation and accountability throughout the supply chain. The 100-count packaging strikes the great balance for medium-sized projects while maintaining an accessible price point for both DIY enthusiasts and professional contractors. Explore a wide range of fasteners in various steel grades, finishes, sizes, and origins to meet your exact project needs. ASMC Industrial Self Drilling Screws deliver professional-grade performance for all your sheet metal fastening needs. These #8-18 x 3" self drilling screws feature a premium Phillips bugle head design with a reliable #2 point, engineered to drill through materials and create secure fastenings in one continuous motion without any pre-drilling preparation. The integrated self-drilling tip functions as its own drill bit, cutting through sheet metal efficiently while eliminating the need to switch between tools. Manufactured from premium low carbon steel with a protective zinc plated finish, these long screws provide the ideal balance of strength, flexibility, and corrosion resistance. The zinc coating protects against rust while enhancing lubricity for smoother driving. Expertly crafted for versatile dual-purpose fastening, these wood screws and metal screws excel in diverse applications including HVAC ductwork, metal roofing, structural steel framing, and equipment mounting. The sharp threads bite deeply into wood fibers for superior holding power, while the self-drilling point cleanly penetrates metal substrates without slipping. The bugle-shaped head profile sits flush with material surfaces, creating a professional finish that allows sheet metal panels to lay flat. The Phillips #2 drive provides excellent torque transfer and reduces cam-out for controlled driving. This pack of 100 high-quality fasteners offers an economical solution for DIY enthusiasts and contractors.