S-91294A563 M20 x 130 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Crafted from high-grade alloy steel with a black-oxide finish, providing superior corrosion resistance and extended service life in harsh industrial environments.
• High Tensile Strength: Class 10.9 grade and 120,000 psi tensile strength ensure reliable performance under heavy loads and high-stress applications, preventing fastener failure.
• Precision Thread Fit: Class 6g thread fit and coarse 2.5mm pitch enable quick, secure installation and optimal clamping force, reducing assembly time and improving joint integrity.
• Optimized Drive Design: 12mm hex drive and standard flat head profile allow for high-torque installation and a flush finish, minimizing protrusion and enhancing safety.
• Full Thread Engagement: Fully threaded 130mm length provides maximum grip and adjustability across the entire fastener, ideal for varying material thicknesses.
• Regulatory Compliance: Meets DIN 7991 specifications and is RoHS 3 & REACH compliant, ensuring environmental safety and global acceptability for regulated industries.
• Robust Hardness: Rockwell C32 hardness offers excellent wear resistance, maintaining thread integrity and drive features through repeated use.

Professional Applications & Engineering Value

This M20 flat head hex screw is engineered to address critical challenges in heavy machinery, structural steelwork, and automotive assemblies where vibration resistance and high clamp load are paramount. The black-oxide alloy steel construction combats rust and wear, while the Class 10.9 strength grade ensures it withstands dynamic stresses without stretching or shearing. The fully threaded, right-hand metric design with a coarse pitch facilitates rapid installation in thick materials, and the flat head with 90° countersink provides a smooth, flush surface to prevent snagging. By conforming to DIN 7991, it guarantees dimensional consistency and reliability, making it a trusted high-strength fastener for engineers seeking to minimize downtime and maintenance costs in demanding applications.

Specification Summary & Compliance

This fastener features an M20x2.5 coarse thread with a Class 6g thread fit per ISO metric standards, ensuring precise dimensional accuracy and interchangeability. It is manufactured in compliance with DIN 7991 for consistent quality and performance. The product is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental and safety regulations for hazardous substances. With a length of 130mm, fully threaded shank, and 90° countersink angle, it is designed to meet rigorous industrial specifications for strength and reliability.