S-91180A919 M20 x 50 mm ISO 8676, DIN 961 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
• High tensile strength of 110,000 PSI ensures reliable performance in demanding heavy-duty applications
• Class 8.8 strength grade provides excellent load-bearing capacity for structural and machinery fastening
• Fine M20x2mm thread pitch delivers enhanced vibration resistance and precise clamping force control
• Full threading along 50mm length allows for maximum engagement and adjustment flexibility
• External hex drive design enables quick installation with standard tools while preventing cam-out
• Rockwell C21 hardness maintains thread integrity under repeated assembly and disassembly

Professional Applications & Engineering Value

This M20 hex head screw delivers exceptional engineering value through its Class 8.8 steel construction and zinc plated finish, specifically engineered to address critical industrial fastening challenges. The combination of 110,000 PSI tensile strength and fine metric threading provides superior resistance to vibration loosening in heavy machinery, structural steel connections, and automotive assemblies. The fully threaded design ensures maximum thread engagement across the entire 50mm length, eliminating weak points while allowing for precise adjustment in complex assemblies. The external hex drive facilitates rapid installation with common tools, reducing assembly time in production environments while maintaining consistent clamping force. This metric hex screw solves common industrial pain points including corrosion-induced failure, vibration-induced loosening, and insufficient load capacity in critical applications.

Specification Summary & Compliance

Manufactured to precise ISO 8676 DIN 961 standards with Class 6h thread fit ensuring dimensional accuracy and interchangeability. The M20x2mm fine thread configuration provides optimal performance in applications requiring precise tension control. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications. The Class 8.8 strength rating and Rockwell C21 hardness confirm consistent mechanical properties across production batches for reliable engineering performance.