S-90402A705 M3 x 12 mm ASME B18.13.1M Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated external-tooth lock washer that maintains clamping force in high-stress environments
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial conditions
• Optimized drive engagement with Phillips No. 1 drive design ensuring secure torque transmission and reduced cam-out risk
• Reliable thread performance featuring Class 6g metric coarse threads for easy assembly and consistent fastening integrity
• High mechanical strength with 60,000 psi tensile strength and Rockwell B73 hardness for demanding applications
• Maximum thread engagement through fully threaded design providing uniform load distribution along the entire fastener length
• Industry-standard compliance meeting ASME B18.13.1M specifications for dimensional accuracy and performance reliability

Professional Applications & Engineering Value

These M3 x 0.5 mm coarse thread screws with external-tooth lock washers provide critical vibration-resistant fastening solutions for industrial machinery, electronic enclosures, and automotive assemblies. The zinc-plated steel construction offers excellent corrosion resistance while maintaining the 60,000 psi tensile strength required for high-stress applications. The combination of fully threaded metric design and Class 6g thread fit ensures precise installation and reliable performance in environments subject to thermal cycling and mechanical shock. The pan head profile with Phillips No. 1 drive facilitates efficient assembly while the integrated locking washer prevents loosening under continuous vibration, making these fasteners ideal for manufacturing equipment, power tools, and precision instruments where fastener integrity is paramount.

Specification Summary & Compliance

This metric screw features M3 x 0.5 mm coarse threads with Class 6g tolerance for precise fitment, manufactured to ASME B18.13.1M dimensional standards. The fastener system includes a 5.84 mm OD external-tooth lock washer and delivers full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. With complete threading along the 12 mm length and Rockwell B73 hardness rating, these industrial screws meet rigorous quality and safety standards for global industrial applications.