S-90403A856 M2 x 4 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 tight connections in high-motion environments
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in demanding conditions
- Optimized drive engagement with Phillips No. 1 drive for efficient installation and reduced cam-out risk
- Reliable thread performance through Class 6g coarse thread fit ensuring consistent engagement and assembly efficiency
- High mechanical strength with 60,000 psi tensile strength and Rockwell B73 hardness for demanding applications
- Secure fastening solution featuring fully threaded design and pan head profile for uniform clamping force distribution
- Industry-standard compliance meeting ASME B18.13.1M specifications for guaranteed interchangeability and quality
Professional Applications & Engineering Value
These M2 x 0.4 mm metric screws with zinc-plated steel construction address critical challenges in precision assembly where vibration-induced loosening compromises system integrity. The integrated internal-tooth lock washer creates permanent spring tension that resists rotational forces, making these rounded head Phillips screws ideal for industrial fasteners in electronics, machinery, and automotive subsystems. The coarse thread design with Class 6g tolerance ensures rapid installation in various materials while maintaining precise thread engagement. With full metric threading and pan head profile, these screws distribute clamping force evenly across connected components, preventing material deformation in delicate assemblies while providing reliable, long-term fastening solutions for OEM and maintenance applications.
Specification Summary & Compliance
These M2 screws feature precise Class 6g thread fit with 0.4 mm coarse pitch threading and 4 mm length dimensions. Manufacturing complies with ASME B18.13.1M standards for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance compliance for global industrial applications.
