S-91263A847 M8 x 40 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
- Exceptional load-bearing capacity from Class 10.9 strength grade, supporting up to 120,000 psi tensile stress
- Precise installation and removal with 5mm hex drive design, reducing tool slippage and assembly time
- Reliable thread engagement with M8 coarse thread and 1.25mm pitch, minimizing cross-threading risks
- Optimized flush mounting thanks to 90° countersink angle and flat head profile, ensuring smooth surface finishes
- Consistent dimensional accuracy with Class 6g thread fit, guaranteeing secure fastening in metric applications
- Enhanced durability from Rockwell C32 hardness, resisting wear under repeated mechanical stress
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these M8 flat head screws deliver robust performance where vibration resistance and structural integrity are critical. The zinc-plated alloy steel construction combats oxidation in moisture-prone environments, while the Class 10.9 strength rating ensures reliable fastening in machinery, automotive assemblies, and structural frameworks. The partially threaded design with 22mm minimum thread length allows for controlled clamping force, reducing material stress in precision equipment. With a coarse thread and hex drive, installation is swift and secure, minimizing production downtime. Compliant with DIN 7991/ISO 10642, these screws meet rigorous international standards for engineering applications requiring high tensile strength and corrosion protection.
Specification Summary & Compliance
This fastener adheres to Class 6g thread fit tolerance per metric standards, ensuring precise thread engagement. Manufacturing follows DIN 7991 and ISO 10642 specifications for dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions adherence. The Class 10.9 strength grade and Rockwell C32 hardness validate its suitability for high-stress applications under ASME-aligned engineering principles.
