S-90403A866 M5 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 through integrated internal-tooth lock washers that maintain clamping force in high-stress environments
- Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial applications
- High-strength performance delivering 60,000 psi tensile strength and Rockwell B73 hardness for demanding assembly requirements
- Reliable thread engagement with Class 6g coarse threads ensuring consistent fastening in various materials
- Optimized drive efficiency featuring Phillips No. 2 drive for secure tool engagement and reduced cam-out risk
- Complete thread coverage with fully threaded design providing maximum holding power along the entire screw length
- Regulatory compliance assurance meeting ASME B18.13.1M standards and environmental regulations for global applications
Professional Applications & Engineering Value
These M5 metric screws with internal-tooth lock washers solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and electrical enclosures. The zinc-plated steel construction provides essential corrosion resistance while maintaining the 60,000 psi tensile strength required for structural applications. The coarse thread pitch (0.8mm) and Class 6g tolerance ensure reliable installation in both metallic and non-metallic materials, reducing assembly time and preventing cross-threading. The combination of fully threaded design and pan head profile creates optimal clamping force distribution, making these Phillips drive screws ideal for applications where vibration resistance and consistent performance are paramount.
Specification Summary & Compliance
This M5 x 0.8mm x 8mm screw features Class 6g thread fit according to metric standards with coarse thread spacing. Manufacturing specifications comply with ASME B18.13.1M for dimensional accuracy and performance reliability. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements, ensuring safe use in regulated industries. The internal-tooth lock washer maintains consistent locking performance with 9.73mm OD and 0.56mm thickness, complementing the zinc-plated steel construction for comprehensive fastener performance.
