S-90402A709 M4 x 12 mm ASME B18.13.1M Steel Pan Head Phillips Screws with External-Tooth Lock Washer
Steel Pan Head Phillips Screws with External-Tooth Lock Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior vibration resistance through the integrated external-tooth lock washer that prevents loosening under dynamic loads
- Enhanced corrosion protection with zinc-plated steel construction for long-lasting performance in demanding environments
- High-strength fastening capability delivering 60,000 psi tensile strength and Rockwell B73 hardness for reliable load-bearing applications
- Optimized drive engagement with Phillips No. 2 drive for efficient installation and reduced cam-out risk
- Precise thread engagement with Class 6g tolerance and coarse M4 x 0.7mm threading for quick assembly and secure holding power
- Complete thread coverage along the 12mm length ensures maximum grip strength across the entire fastened joint
- Regulatory compliance assurance meeting ASME B18.13.1M standards and environmental directives for global project acceptance
Professional Applications & Engineering Value
These M4 metric screws with external-tooth lock washers provide critical vibration-resistant fastening solutions for industrial equipment, automotive assemblies, and machinery where dynamic loads threaten joint integrity. The zinc-plated steel construction offers superior corrosion resistance, extending service life in harsh environments while maintaining 60,000 psi tensile strength. The combination of coarse threading and Class 6g tolerance ensures rapid installation with reliable thread engagement, reducing assembly time while preventing back-off in high-vibration applications. The rounded pan head design with Phillips drive provides a low-profile, secure fastening solution that withstands repeated stress cycles without compromising performance.
Specification Summary & Compliance
This fully threaded M4 x 0.7mm x 12mm screw features Class 6g thread fit precision and comes with an integrated external-tooth lock washer (8.25mm OD, 0.6mm thickness). Manufactured to ASME B18.13.1M specifications with Rockwell B73 hardness and 60,000 psi tensile strength. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe, sustainable industrial use.
