Pack of 50 Self Drilling Stainless Steel Screws Bolts with Hex Head, Tapping for Corrugated Metal, PVC Roof Panels, Cladding, Wire Ducts (No.12 (5.5mm) x 25mm)

A2 304 STAINLESS STEEL CORE WITH HARDENED DRILL POINT – BUILT FOR DURABILITY & CORROSION RESISTANCE Manufactured with an A2 304 stainless steel head and main shank for excellent corrosion resistance, combined with a hardened drill point and lead-in threads for fast, reliable self-drilling performance. The bi-metal construction gives you the best of both worlds: a screw that won't rust in outdoor, agricultural, or coastal applications, with a drill tip hard enough to cut through metal sheet without pre-drilling — even in repeated use across multiple fixings. SELF-DRILLING TIP – NO PILOT HOLE REQUIRED FOR FAST INSTALLATION The hardened drill point is engineered to penetrate steel sheet, aluminium, and metal substrates without any pre-drilling — significantly reducing installation time on metalwork and cladding projects. The drill flutes clear swarf efficiently as the screw advances, while the carefully matched lead-in threads engage cleanly the moment the drill point breaks through. Compatible with sheet metal up to 3mm thickness in a single operation. 5.5 x 25mm – PRECISION ENGINEERED FOR METAL CLADDING, HEAVY GAUGE STEEL, STRUCTURAL FIXINGS Each pack contains 50 individual 5.5 x 25mm self-drilling hex head screws. Sized at 5.5mm x 25mm — ideal for metal cladding installations into heavier gauge steel purlins or wherever extra clamping force is required. The 5.5mm shank delivers superior pull-out resistance to 4.8mm equivalents, and the 25mm length suits combined material thicknesses up to 19mm. 8mm HEX HEAD – DRIVEN WITH STANDARD SOCKETS, NUT SETTERS & IMPACT DRIVERS The 8mm integrated hex head allows fast, controlled installation using any standard 8mm magnetic nut setter, socket driver, or impact driver bit. The hex profile delivers excellent torque transfer without cam-out — a common failure point with cross-head screws when driving into hard metals. Compatible with cordless drills, impact drivers, and pneumatic tools at speeds up to 2,500 RPM. The flanged hex base spreads load evenly across the fixing surface during tightening. VERSATILE APPLICATIONS – METAL FIXING, CLADDING, AGRICULTURAL & INDUSTRIAL USE Suitable for fixing corrugated metal sheet, profile cladding, wire ducting, cable trays, sheet metal repairs, metal stud framing, partition systems, garden building structures, agricultural metalwork, light industrial framing, and commercial sheet metal fabrication. The A2 304 stainless steel construction ensures long-term corrosion resistance in outdoor, rural, and coastal environments — significantly better than zinc-plated or carbon steel alternatives. Available in our full range from 5.5mm x 19mm to 5.5mm x 80mm — browse our store for the complete self-drilling screw range.