Hexagonal Flat Round Head Screw

Hexagonal Flat Round Head Screws are engineered for high-torque applications where a flush-mounted fastener is critical to maintaining surface integrity and safety. These screws feature a countersunk flat head with an internal hexagonal drive, allowing precise installation using a hex key or spanner. The design ensures the head sits entirely below or level with the material surface, eliminating protrusions in machinery, automotive assemblies, or structural frameworks. Available in materials like Grade 8 carbon steel or corrosion-resistant stainless steel (A2/A4), they meet DIN 7991 and ISO 7380-2 standards, guaranteeing consistent thread geometry (UNC/UNF/UNEF) and tensile strength up to 12.9 grade for heavy-load scenarios. Full-threaded shanks provide uniform grip across joints, while the hex socket prevents cam-out during tightening, making them ideal for repetitive disassembly in maintenance-heavy environments.

Surface treatments like zinc plating or black phosphating enhance durability in humid or chemically aggressive settings, while specialty coatings (e.g., blue epoxy) cater to aesthetic or identification needs in architectural or OEM applications. The M5-M20 metric range and imperial equivalents (e.g., 5/16-18) ensure compatibility with global machinery specs, from securing conveyor belts to anchoring electrical enclosures. Customization options allow adjustments in thread pitch, length, and hardness to match niche requirements, such as vibration-resistant assemblies in rail or aerospace systems. Their blend of precision machining, material versatility, and compliance with industrial norms makes these screws a staple for engineers prioritizing reliability, corrosion resistance, and clean installation profiles.