S-90373A135 M20 x 40 mm ISO 4017, DIN 933 Extreme-Strength Metric Class12.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with Class 12.9 strength rating and 170,000 psi tensile strength for reliable performance in high-stress environments
• Superior wear resistance due to Rockwell C39 hardness, ensuring extended service life under repetitive mechanical stress
• Optimized installation efficiency through external hex drive design and 30mm head width for secure tool engagement and torque transmission
• Precision thread compatibility with Class 6g tolerance and M20x2.5 coarse thread profile for quick assembly and vibration resistance
• Full-threaded design providing consistent clamping force along the entire 40mm length for uniform load distribution
• Regulatory compliance assurance meeting ISO 4017/DIN 933 manufacturing standards alongside RoHS 3 and REACH environmental directives
• Material reliability through high-grade steel construction maintaining structural integrity in corrosive industrial atmospheres

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this M20 hex head screw delivers critical solutions for structural assemblies requiring high tensile strength and fatigue resistance. The Class 12.9 steel construction combined with fully threaded metric design prevents joint loosening under dynamic loads, while the coarse thread pitch enables rapid installation in structural steel, heavy machinery, and construction equipment. The external hex drive facilitates high-torque installation with standard tools, reducing assembly time in manufacturing and maintenance operations. Compliant with ISO 4017/DIN 933 standards, these hex head screws provide certified performance for engineering projects demanding precise thread fit and long-term reliability in demanding environments.

Specification Summary & Compliance

Manufactured to ISO 4017/DIN 933 specifications with Class 6g thread fit tolerance ensuring dimensional accuracy. The metric coarse thread (M20x2.5) provides optimal engagement in various materials, while the 40mm length and fully threaded design offer versatile fastening solutions. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to international substance restrictions for industrial components.