S-91294A522 M20 x 60 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel prolongs service life, minimizing maintenance needs in harsh industrial environments.
• Precise Class 6g thread fit with coarse pitch (M20x2.5) allows for quick, secure installation and easy alignment, saving assembly time and labor costs.
• High hardness rating (Rockwell C32) combined with Class 10.9 strength grade provides excellent wear resistance and durability for long-term structural integrity.
• 90° countersink angle and flat head design enable a flush, unobtrusive finish, ideal for applications where protrusion must be avoided for safety or aesthetics.
• Full threading along the 60mm length ensures maximum grip and uniform load distribution, enhancing joint stability in heavy machinery and equipment.
• Compliance with DIN 7991/ISO 10642, RoHS 3, and REACH guarantees adherence to international quality and environmental standards, facilitating global procurement and regulatory acceptance.

Professional Applications & Engineering Value

This M20 flat head hex screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and environmental degradation. The black-oxide alloy steel construction offers enhanced corrosion protection, making it suitable for outdoor machinery, automotive assemblies, and construction frameworks exposed to moisture. With a coarse metric thread and Class 6g fit, it ensures rapid installation and secure fastening in high-vibration environments, reducing downtime. The fully threaded design and 90° countersink angle provide a seamless fit in pre-drilled holes, ideal for applications requiring a smooth surface finish, like conveyor systems or structural steel connections. By combining high tensile strength with standardized dimensions per DIN 7991/ISO 10642, this screw delivers consistent performance, supporting efficient maintenance and replacement cycles in B2B procurement.

Specification Summary & Compliance

This fastener features precise metric threading (M20x2.5) with a Class 6g tolerance for accurate fit, and is manufactured to meet DIN 7991 (identical to ISO 10642) specifications for flat head hex screws. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for environmentally conscious industrial use. The Class 10.9 strength grade and Rockwell C32 hardness confirm its reliability under high-load conditions, backed by a tensile strength of 120,000 psi.