S-91263A878 M5 x 14 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with Class 10.9 rating (120,000 psi) ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-plated alloy steel construction extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precise coarse threading (M5 x 0.8mm) with Class 6g fit allows for quick and secure installation, saving time during assembly while maintaining vibration resistance.
• Durable flat head design with 90° countersink provides a flush finish for sleek, safe surfaces, ideal for applications where protrusion is a concern.
• Hex drive (3mm) enables easy torque application with standard tools, enhancing installation efficiency and reducing slippage risks.
• Full compliance with DIN 7991 standards guarantees consistent quality and interchangeability, supporting seamless integration into existing metric fastener systems.
• RoHS 3 and REACH regulatory adherence ensures environmental and safety compliance, making these screws suitable for global supply chains and sensitive industries.

Professional Applications & Engineering Value

This M5 flat head screw is engineered to address common industrial fastening challenges, such as vibration loosening and corrosion-induced failure. The zinc-plated alloy steel material, combined with a Class 10.9 strength grade and Rockwell C32 hardness, provides robust resistance to mechanical stress and environmental factors. The coarse metric thread (0.8mm pitch) and fully threaded design ensure rapid assembly and strong holding power in materials like metal and hard plastics, reducing installation time in production lines. Ideal for machinery, automotive, and construction applications, these screws offer a reliable hex drive solution that maintains integrity under dynamic loads, enhancing overall equipment durability and safety.

Specification Summary & Compliance

This fastener features precise M5 x 0.8mm coarse threads with a Class 6g thread fit for consistent dimensional accuracy. It adheres to DIN 7991 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. The 14mm length and 90° countersink angle are designed to meet standard industrial requirements for flat head screw applications.