S-91290A082 M20 x 180 mm DIN 912, ISO 4762 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength-to-weight ratio with Class 12.9 rating and 170,000 PSI tensile strength for critical structural applications
• Superior corrosion resistance through black-oxide surface treatment, extending service life in demanding environments
• Precise torque transmission enabled by 17mm hex socket drive, preventing tool slippage and head deformation
• Optimized thread engagement with Class 5g6g thread fit and 52mm partial threading for secure fastening without unnecessary weight
• Enhanced durability from Rockwell C37 hardness, maintaining dimensional stability under repeated loading
• Global compatibility through compliance with DIN 912/ISO 4762 standards for international project specifications
• Environmental compliance meeting RoHS 3 and REACH regulations for sustainable manufacturing operations

Professional Applications & Engineering Value

Engineered for high-stress industrial assemblies, these M20 socket head cap screws provide reliable fastening solutions where vibration resistance and structural integrity are paramount. The black-oxide alloy steel construction offers superior protection against environmental degradation while maintaining the Class 12.9 strength rating essential for heavy machinery, automotive frames, and construction equipment. The coarse 2.5mm pitch metric thread ensures rapid installation and secure holding power in steel-to-steel connections, while the partially threaded design concentrates strength where needed most. These industrial fasteners solve common engineering challenges by combining maximum clamping force with corrosion resistance, making them ideal for manufacturing equipment, structural steel connections, and precision machinery requiring dependable, high-strength fastening solutions.

Specification Summary & Compliance

Manufactured to DIN 912/ISO 4762 specifications with Class 5g6g thread fit tolerance ensuring precise engagement. The metric coarse thread (M20 x 2.5mm) follows international standards for compatibility. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to hazardous substance restrictions. The 180mm length with 52mm thread length provides optimal unthreaded shank for shear applications while maintaining standardized dimensions per international fastener specifications.