S-91280A844 M16 x 50 mm ISO 4017, DIN 933, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with Class 8.8 strength grade, providing reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in harsh environments
• Optimized thread engagement with M16x2 mm coarse threading for faster assembly and reduced cross-threading risk
• High tensile strength of 110,000 psi ensures secure fastening under heavy loads and vibration
• Precision thread fit (Class 6h) guarantees consistent performance and proper mating with nuts
• External hex drive design enables high torque application with standard tools for efficient installation
• Full threading along the 50 mm length provides maximum grip and adjustment flexibility

Professional Applications & Engineering Value

This M16 hex head screw delivers critical engineering advantages for industrial assembly challenges. The Class 8.8 steel construction with Rockwell C21 hardness provides the ideal balance between strength and ductility, preventing brittle failure while maintaining 110,000 psi tensile strength. The zinc plated finish offers essential corrosion protection for machinery, structural frameworks, and outdoor equipment where environmental exposure is a concern. The coarse metric threading (M16x2 mm) ensures rapid installation in production environments while the external hex drive accommodates high torque requirements. Fully threaded along its 50 mm length, this ISO 4017 compliant fastener provides maximum thread engagement for critical connections in construction, manufacturing, and heavy equipment applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This metric hex head screw features precision Class 6h thread fit according to ISO standards, ensuring consistent dimensional accuracy. Manufacturing complies with ISO 4017, DIN 933, and SAE J1199 specifications for dimensional and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety, making it suitable for regulated industries and international supply chains.