S-91294A559 M18 x 50 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 high tensile strength (120,000 psi) for reliable performance in demanding applications.
• Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh environments.
• Optimized for high-strength industrial assemblies with a Rockwell C32 hardness that resists wear and deformation.
• Secure, flush-mount installation enabled by the 90° countersink flat head design, ideal for applications requiring a smooth surface.
• Efficient installation and removal with a 12 mm hex drive, providing high torque transfer and reducing tool slippage.
• Reliable thread engagement with a coarse M18x2.5 thread and Class 6g fit, ensuring consistent clamping force and vibration resistance.
• Full-threaded design for maximum grip along the entire 50 mm length, enhancing joint integrity.

Professional Applications & Engineering Value

This M18x2.5 Class 10.9 black-oxide alloy steel flat head screw is engineered to solve critical fastening challenges in heavy-duty industrial settings. Its high tensile strength and Rockwell C32 hardness make it ideal for structural applications, machinery, and equipment assembly where dynamic loads and stress are common. The black-oxide coating provides a durable barrier against moisture and chemicals, reducing maintenance needs in corrosive environments. With a standard 90° countersink and fully threaded shank, it ensures a flush, secure fit that minimizes protrusion and distributes clamping force evenly. Compatible with hex drive tools, it streamlines installation in confined spaces, making it a reliable choice for automotive, construction, and manufacturing sectors requiring metric coarse thread fasteners that meet rigorous performance standards.

Specification Summary & Compliance

This fastener adheres to precise dimensional and performance criteria, including M18x2.5 coarse threads with a Class 6g thread fit for consistent accuracy. It is manufactured in compliance with DIN 7991 / ISO 10642 specifications for flat head screws, ensuring interchangeability and reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its adherence to environmental and safety regulations for hazardous substances. With a right-hand thread direction and 50 mm length, it is designed for standardized industrial use, providing assurance of quality and regulatory conformity in global supply chains.