S-91735A303 4-40 x 1 1/2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 316 stainless steel construction, ideal for harsh environments and chemical exposure
- High-strength performance with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, long-lasting fastening
- Excellent thread engagement provided by Class 2A coarse UNC threads, ensuring secure installation and vibration resistance
- Enhanced durability through passivated surface finish, increasing corrosion protection and extending service life
- Wide compatibility with standard #1 Phillips drive, enabling efficient installation with common tools
- Full threading design for maximum grip along the entire 1 1/2" length, providing uniform clamping force
- Regulatory compliance with ASME B18.6.3, RoHS 3, and REACH standards, ensuring safety and environmental responsibility
Professional Applications & Engineering Value
These 4-40 UNC fully threaded screws in 316 stainless steel deliver exceptional performance in demanding industrial environments where corrosion resistance is critical. The passivated finish provides an additional protective layer against chemical attack and oxidation, making these rounded head screws ideal for marine equipment, chemical processing plants, and food processing machinery. The coarse thread design ensures quick assembly and superior vibration resistance, while the Phillips drive enables efficient installation without stripping. With complete threading along the 1 1/2" length, these industrial fasteners provide consistent clamping force across the entire engagement area, preventing loosening under dynamic loads and thermal cycling conditions common in manufacturing and heavy equipment applications.
Specification Summary & Compliance
These screws feature Class 2A thread fit per UNC standards with precise dimensional accuracy. Manufacturing complies with ASME B18.6.3 specifications for pan head machine screws. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet current environmental and safety standards for industrial use worldwide.
