S-90403A874 M6 x 20 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 washers that maintain tight fastening under dynamic loads
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh industrial environments
- High mechanical strength delivering 60,000 psi tensile strength and Rockwell B73 hardness for reliable load-bearing applications
- Optimized drive engagement with Phillips No. 3 drive for efficient installation and reduced cam-out risk
- Precision thread performance with Class 6g coarse threads ensuring consistent mating and assembly reliability
- Full-thread engagement capability along the 20mm length for maximum grip range and adjustment flexibility
- Regulatory compliance assurance meeting ASME B18.13.1M specifications and environmental standards for global procurement
Professional Applications & Engineering Value
These M6 metric screws with internal-tooth lock washers provide critical vibration resistance in demanding applications where loosening under dynamic stress compromises safety and performance. The zinc-plated steel construction offers durable corrosion protection for machinery, electrical enclosures, and automotive assemblies exposed to moisture or chemicals. With Class 6g coarse threads and fully threaded 20mm length, these fasteners ensure rapid installation and reliable clamping force across varying material thicknesses. The combination of 60,000 psi tensile strength and Rockwell B73 hardness makes them ideal for structural components subject to mechanical stress, while the Phillips drive enables efficient high-volume assembly operations without specialized tools.
Specification Summary & Compliance
Manufactured to ASME B18.13.1M standards with Class 6g thread fit and M6x1mm coarse thread pitch. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 12mm head diameter, 4.6mm head height with pan-style rounded profile, and zinc-plated steel construction throughout screw and lock washer components.
