S-91304A139 M6 x 45 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capability: Class 10.9 strength grade and 120,000 psi tensile strength ensure reliable performance under high-stress industrial applications.
• Enhanced Corrosion Resistance: Blue-dyed zinc plating provides a durable barrier against rust and environmental degradation, extending service life.
• Precise, Secure Fastening: M6 coarse thread with 1 mm pitch and Class 6g fit offers quick assembly and vibration resistance in demanding conditions.
• Optimized for Flush Mounting: Standard 90° countersink angle and flat head design allow for seamless, unobtrusive installation in pre-drilled surfaces.
• Efficient Installation & Removal: 4 mm hex drive enables high-torque application with standard tools, reducing assembly time and labor costs.
• Durable Material Construction: Alloy steel with Rockwell C32 hardness maintains structural integrity and resists wear in repetitive use scenarios.
• Regulatory Compliance Assurance: Meets DIN 7991/ISO 10642 standards and environmental directives (RoHS 3, REACH) for global supply chain compatibility.

Professional Applications & Engineering Value

Engineered for robust performance, these M6 flat head hex screws address critical challenges in machinery assembly, automotive frameworks, and structural metalwork. The partially threaded design with an 18 mm thread length concentrates clamping force precisely where needed, preventing joint loosening under dynamic loads. The blue zinc-plated alloy steel construction combats corrosion in humid or outdoor environments, reducing maintenance intervals. With a coarse thread pitch and Class 10.9 strength, they provide rapid installation and high shear resistance, ideal for securing heavy-duty components like engine mounts, conveyor systems, and industrial enclosures. This combination of metric threading and standardized dimensions ensures interchangeability and compliance with European engineering specifications.

Specification Summary & Compliance

This fastener adheres to DIN 7991 / ISO 10642 specifications, with precise Class 6g thread tolerance for consistent fit. The 45 mm length and 90° countersink angle facilitate exact flush mounting. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no restricted substances are used. Manufacturing follows strict quality controls for tensile strength (120,000 psi) and hardness (Rockwell C32), meeting global industrial standards for safety and performance.