S-91304A154 M8 x 25 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 in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the blue zinc plating protects against environmental damage, extending service life in harsh conditions.
• High-strength Class 10.9 rating and Rockwell C32 hardness provide dependable durability for demanding industrial use.
• Precision M8 coarse threading (1.25mm pitch) with Class 6g fit enables quick, secure installation and easy alignment.
• Hex drive design (5mm) allows for efficient torque application with standard tools, speeding up assembly processes.
• Full threading and flat head profile ensure flush mounting and uniform load distribution, ideal for countersunk applications.
• Compliance with DIN 7991/ISO 10642 standards guarantees consistent quality and interchangeability in metric fastener systems.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these M8 flat head screws address critical challenges in machinery assembly, automotive components, and structural frameworks. The blue zinc-plated alloy steel construction combats corrosion in humid or chemically aggressive environments, while the Class 10.9 strength grade withstands dynamic loads and vibrations without loosening. The coarse thread with 1.25mm pitch and hex drive facilitate rapid installation in materials where fine threading may be impractical, reducing assembly time and labor costs. Ideal for use in countersunk holes with a 90° angle, they provide a smooth, flush finish that minimizes protrusion risks in moving parts, enhancing both safety and aesthetics in precision engineering projects.

Specification Summary & Compliance

This metric flat head screw features M8 x 1.25mm coarse threading with a Class 6g thread fit for standard tolerance, ensuring compatibility with metric nut and tapped hole systems. Manufactured to meet DIN 7991 and ISO 10642 specifications, it adheres to rigorous dimensional and performance criteria. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible sourcing for global supply chains.