S-90403A858 M2 x 6 mm ASME B18.13.1M Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated internal-tooth lock washer for permanent fastening in high-motion environments
• Enhanced corrosion protection through zinc-plated steel construction, extending service life in industrial settings
• Reliable thread engagement with fully threaded Class 6g coarse pitch design for faster installation and secure holding power
• Optimized drive performance featuring Phillips No. 1 drive for efficient torque transfer and reduced cam-out risk
• Robust mechanical strength delivering 60,000 psi tensile strength and Rockwell B73 hardness for demanding applications
• Secure anti-loosening performance through the internal-tooth lock washer design that maintains clamp force under vibration
• Industry-standard compatibility with rounded pan head profile meeting dimensional requirements for various assembly applications

Professional Applications & Engineering Value

These M2 metric screws with internal-tooth lock washers provide critical vibration-resistant fastening solutions for industrial equipment, electronic enclosures, and machinery assemblies. The zinc-plated steel construction offers essential corrosion protection while maintaining the 60,000 psi tensile strength required for structural integrity. The Class 6g thread fit ensures precise engagement with mating components, while the coarse 0.4mm pitch enables rapid installation in production environments. The integrated lock washer design eliminates the need for separate locking components, reducing assembly time and preventing loosening in applications subject to constant vibration or thermal cycling. These pan head Phillips screws deliver reliable performance in automotive, electronics, and industrial manufacturing where vibration resistance and corrosion protection are paramount.

Specification Summary & Compliance

Manufactured to exact metric dimensions with M2 x 0.4mm thread specification and Class 6g thread fit tolerance. Fully compliant with ASME B18.13.1M mechanical and dimensional standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features fully threaded design with coarse thread spacing for optimal performance in various materials. The internal-tooth lock washer (4.7mm OD, 0.33mm thickness) is integrally formed from zinc-plated steel for consistent locking performance.