S-90402A701 M3 x 5 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 with integrated external-tooth lock washers that maintain secure fastening in high-motion environments
- Enhanced corrosion protection through zinc-plated steel construction, extending service life in demanding industrial conditions
- Reliable thread engagement with fully threaded M3 coarse threads and Class 6g fit for consistent performance across applications
- Optimized drive efficiency featuring Phillips No. 1 drive for secure tool engagement and reduced cam-out risk
- High mechanical strength delivering 60,000 psi tensile strength and Rockwell B73 hardness for heavy-duty fastening requirements
- Secure washer integration with 5.84mm OD external-tooth design that bites into surfaces, preventing loosening under stress
- Pan head design advantage providing low-profile installation with rounded head profile for flush mounting where clearance is limited
Professional Applications & Engineering Value
These M3 metric screws with external-tooth lock washers solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and electronic enclosures. The zinc-plated steel construction provides essential corrosion resistance for harsh environments, while the coarse thread pitch (0.5mm) ensures rapid installation and reliable holding in various materials. The combination of fully threaded design and Class 6g thread fit guarantees maximum thread contact and uniform stress distribution. With 60,000 psi tensile strength, these rounded head screws maintain integrity under dynamic loads, making them ideal for applications where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 6g thread tolerance and metric coarse threading (M3 x 0.5mm). Fully compliant with ASME B18.13.1M manufacturing specifications, ensuring interchangeability and reliability. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use across global markets. The external-tooth lock washer (5.84mm OD, 0.45mm thickness) provides certified locking performance as specified in applicable industrial standards.
