DIN 931 hexagon head screws — Grade 10.9, M20 x 90, galvanized (gal Zn), annealed. Pack of 25. Key benefits High strength: Grade 10.9 steel provides strong tensile capacity and secure clamping for heavy-duty connections. Corrosion resistance: Galvanized finish protects against rust and extends service life in outdoor and damp environments. Installation-ready: DIN 931 hexagon head and partially threaded shank allow easy tightening with standard hex tools and good alignment in assemblies. Reduced stress and better ductility during fitting: Annealed treatment helps relieve internal stresses and improves handling and seating during installation. Value pack: 25 screws per pack for consistent supply on job sites and reduced reordering. What this solves Prevents loosening and failure under heavy loads by combining high-grade material with a proven hex-head design. Reduces maintenance and replacement frequency in corrosive environments thanks to galvanization. Simplifies assembly and alignment in structural and mechanical applications with the DIN 931 form factor. Important attributes Standard: DIN 931 (hexagon head, partially threaded shank) Grade: 10.9 (high-strength bolt) Size: M20 x 90 (metric thread diameter 20 mm, length 90 mm) Finish: Galvanized (gal Zn) Heat treatment: Annealed Pack quantity: 25 pieces Compatibility and fit Designed for use with M20 nuts and compatible washers. Use standard M20 mating hardware that matches the bolt’s grade and application requirements. Fits applications using DIN-compliant fastening practices and tools (standard hex keys or wrenches). Practical applications (examples) Structural steelwork: Securing connections in steel frameworks, beams, and brackets where high clamp force is required. Machinery and equipment assembly: Fastening heavy components, housings, and baseplates subject to dynamic loads and vibration. Outdoor installations and infrastructure: Fixing components on fences, gates, lighting columns, or signage where corrosion resistance is needed. Installation tips Use matching M20 nuts and appropriate washers for best load distribution. Tighten to the torque recommended for grade 10.9 bolts in your project specifications to ensure proper preload. Inspect galvanized surface for handling damage before installation; replace any compromised fasteners. What you get A reliable set of 25 DIN 931 hexagon head screws, grade 10.9, M20 x 90, galvanized and annealed — suitable for heavy-duty, corrosion-resistant bolting tasks.