S-91180A540 M8 x 40 mm ISO 8676, DIN 961 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Medium-Strength Metric Class 8.8 Steel Hex 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
- Exceptional load-bearing capacity with Class 8.8 strength rating and 110,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Precise thread engagement with M8 x 1mm fine thread and Class 6h fit ensuring vibration resistance and secure fastening
- Optimized torque transmission via external hex drive and 13mm head width for easy installation with standard tools
- Maximum holding power through fully threaded design distributing stress evenly along the entire 40mm length
- Consistent quality assurance meeting ISO 8676 (DIN 961) specifications for dimensional accuracy and performance
- Environmental compliance with RoHS 3 and REACH standards for safe use across regulated industries
Professional Applications & Engineering Value
These M8 hex head screws deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The Class 8.8 steel construction provides reliable strength for machinery assembly, automotive components, and structural frameworks, while the fine thread metric configuration (M8 x 1mm) ensures precise alignment and superior clamping force in precision equipment. The zinc plated finish protects against corrosion in manufacturing environments, and the fully threaded design maximizes surface contact for permanent installations. Engineered to ISO 8676 standards, these industrial fasteners prevent loosening under dynamic loads, making them ideal for applications requiring consistent performance and long-term reliability.
Specification Summary & Compliance
Manufactured to exact ISO 8676 (DIN 961) specifications with Class 6h thread fit tolerance for precision engagement. The metric fine thread (M8 x 1mm) provides superior vibration resistance compared to coarse threads. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features Rockwell C21 hardness and 110,000 psi tensile strength meeting Class 8.8 mechanical properties. Right-hand threaded with external hex drive for standard tool compatibility.
