S-90403A859 M2 x 8 mm ASME B18.13.1M Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
Steel Pan Head Phillips Screws with Internal-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 with integrated internal-tooth lock washer that maintains secure fastening in high-stress environments
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in demanding conditions
- Optimized drive engagement with Phillips No. 1 drive design ensuring reliable installation and reduced cam-out risk
- Exceptional mechanical strength delivering 60,000 psi tensile strength and Rockwell B73 hardness for heavy-duty applications
- Precision threading performance with Class 6g coarse threads providing excellent fit and consistent clamping force
- Time-saving installation through fully threaded design and right-hand orientation for efficient assembly processes
- Regulatory compliance assurance meeting ASME B18.13.1M standards and environmental regulations for global industrial use
Professional Applications & Engineering Value
These M2 metric screws with zinc-plated steel construction and integrated internal-tooth lock washer address critical vibration-induced loosening in industrial equipment and electronic assemblies. The Class 6g coarse threading ensures rapid installation while maintaining precise tolerances, significantly reducing assembly time in high-volume production environments. The rounded pan head profile with Phillips drive provides optimal torque transmission without damaging sensitive components, making these fasteners ideal for vibration-resistant applications in automotive electronics, control panels, and machinery where reliable performance under dynamic loads is essential. The combination of 60,000 psi tensile strength and Rockwell B73 hardness ensures these screws withstand repeated stress cycles without compromising joint integrity.
Specification Summary & Compliance
Manufactured to exact metric dimensions with M2 x 0.4mm thread specification and Class 6g thread fit tolerance for precision applications. Fully compliant with ASME B18.13.1M mechanical standards, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) regulations for chemical safety. Features fully threaded design with 8mm length and right-hand thread direction for standardized industrial use.
