S-91306A782 M8 x 55 mm ISO 7380 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength grade and 140,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc-plated alloy steel construction, extending service life in harsh industrial environments
• Precision thread engagement with M8 x 1.25 mm coarse pitch and Class 6g fit ensuring secure fastening and vibration resistance
• Optimized drive efficiency featuring 5 mm hex drive for high torque application and reduced tool slippage
• Enhanced durability with Rockwell C32 hardness maintaining structural integrity under repeated stress
• Full-thread design providing maximum grip length and uniform stress distribution along the entire 55 mm length
• Regulatory compliance meeting ISO 7380 standards and environmental regulations for global project specifications

Professional Applications & Engineering Value

This Class 10.9 metric hex screw delivers critical engineering solutions for heavy-duty applications where failure is not an option. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, structural assemblies, and outdoor equipment exposed to moisture and chemicals. With its M8 coarse thread (1.25 mm pitch) and fully threaded design, installation efficiency is maximized while maintaining consistent clamping force across the entire 55 mm length. The rounded button head profile offers a finished appearance while the hex drive accommodates high torque requirements in confined spaces. These industrial fasteners are engineered to withstand extreme vibrations and dynamic loads in automotive, construction, and manufacturing applications where 140,000 psi tensile strength and Rockwell C32 hardness prevent stripping and premature failure.

Specification Summary & Compliance

This fastener maintains Class 6g thread fit tolerance per metric standards with right-hand thread direction and coarse thread spacing. Manufacturing complies with ISO 7380 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for international projects. The 14 mm head diameter with 4.4 mm height provides optimal bearing surface while the 5 mm hex drive ensures compatibility with standard industrial tools.