Maximum Strength 12.9 Grade Alloy Steel: Heat-treated to the highest grade standard, these screws deliver superior tensile strength and shear resistance for demanding mechanical applications. Protective Black Oxide Coating: Black oxide finish provides excellent corrosion resistance and reduces galling, while offering a professional, non-reflective appearance. Deep Hex Socket for High Torque: 3mm internal hex socket allows maximum torque transmission without stripping, ensuring secure fastening in high-stress applications. Precision M4 Size: The M4 hex socket screw with full threading offers versatile fastening solutions for machinery, automotive, and industrial equipment. Industrial-Grade Reliability: Engineered for heavy-duty use in automotive, manufacturing, and construction applications where failure is not an option. Meet the highest standard of fastening performance with these industrial-grade M4 socket head cap screws.
Unmatched Strength and Durability
These screws are manufactured from 12.9 grade alloy steel, representing the highest strength grade available for socket head cap screws.
The heat treatment process ensures consistent hardness throughout each screw, providing superior resistance to stripping, shearing, and fatigue failure.
Advanced Corrosion Protection
The black oxide coating not only enhances the screws' appearance but also provides substantial corrosion resistance.
This protective layer helps prevent rust formation while reducing friction during installation.
Precision Engineering for Optimal Performance
Each screw features a deep 3mm hex socket designed to accommodate standard Allen keys with secure engagement.
This design allows for higher torque application compared to traditional screw drives, reducing the risk of tool slippage and damaged fastener heads.
Versatile Industrial Applications
Whether you're working on automotive engines, industrial machinery, CNC equipment, or heavy-duty fabrication projects,
these screws provide reliable performance where standard fasteners would fail.