S-90358A138 M6 x 18 mm Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 140,000 psi tensile strength and Rockwell C32 hardness for reliable performance in demanding applications
• Precise thread fit and smooth assembly thanks to Class 5g6g thread tolerance ensuring consistent engagement and reduced cross-threading risks
• Space-saving ultra-low profile head designed for applications with limited clearance while maintaining full hex drive functionality
• Superior corrosion resistance provided by black-oxide coating on alloy steel for extended service life in various environments
• Optimized drive efficiency with 4mm hex socket allowing high torque application and secure fastening without stripping
• Reliable coarse thread performance with 1mm pitch offering quick installation and superior resistance to vibration loosening
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These M6 socket head cap screws deliver critical engineering solutions where space constraints and high strength requirements intersect. The ultra-low profile socket head enables installation in compact assemblies while maintaining full 4mm hex drive capability for secure torque application. Manufactured from black-oxide alloy steel, these fasteners provide superior corrosion protection in industrial environments while maintaining 140,000 psi tensile strength for structural applications. The Class 5g6g thread fit ensures precise engagement in metric coarse thread applications, reducing assembly time and preventing thread damage. Ideal for machinery, automotive components, and precision equipment where fully threaded design provides uniform clamping force distribution.

Specification Summary & Compliance

This metric socket head cap screw features M6 x 1mm coarse threading with Class 5g6g thread tolerance per ISO standards, ensuring precise fit and reliable performance. The 18mm length maintains tight dimensional control with length tolerance of -0.127mm to 0.127mm. Manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, these screws are suitable for regulated industrial applications worldwide. The combination of Rockwell C32 hardness and 140,000 psi tensile strength provides durable performance in high-stress environments.