S-91280A202 M12 x 20 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with Class 8.8 strength grade steel providing 110,000 psi tensile strength for reliable performance in demanding applications
• Enhanced torque transmission through external hex drive design that prevents stripping and ensures secure fastening
• Optimized thread engagement with M12 coarse thread (1.75mm pitch) for faster installation and reduced cross-threading risk
• Consistent dimensional accuracy maintained through Class 6g thread fit tolerance for precise mating with nuts and threaded holes
• Exceptional durability with Rockwell C21 hardness rating that resists wear and deformation under repeated stress
• Full-threaded design maximizing grip length and distributing clamping force evenly across the entire 20mm length
• Regulatory compliance assurance meeting international ISO 4017 standards while being RoHS 3 and REACH compliant for global industrial use

Professional Applications & Engineering Value

These M12 hex head screws deliver exceptional engineering value in industrial applications where vibration resistance and structural integrity are critical. The Class 8.8 steel construction provides the ideal balance between strength and ductility, preventing brittle failure in construction and machinery assembly. The metric coarse thread with 1.75mm pitch ensures rapid installation in production environments while maintaining secure fastening in materials where fine threads might strip. The external hex drive accommodates standard wrenches for high-torque applications without the cam-out issues common with internal drive systems. The fully threaded right-hand design offers consistent clamping force distribution, making these steel fasteners ideal for joining components of varying thicknesses in automotive, industrial equipment, and structural frameworks.

Specification Summary & Compliance

This hex head screw features precise M12 x 1.75mm metric coarse thread with Class 6g tolerance for optimal fit. Manufactured to ISO 4017 specifications (equivalent to DIN 933) with Class 8.8 strength grade certification. The fastener maintains dimensional accuracy with 19mm head width and 7.7mm head height. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical substance restrictions are met for industrial and international trade requirements.