S-90273A442 3/8"-16 x 2 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
• Exceptional tensile strength rated at 60,000 psi for reliable performance in high-stress applications
• Precise Class 2A thread fit provides smooth installation and secure fastening with consistent engagement
• Optimized 82° countersink angle enables flush mounting for clean, professional finishes in visible applications
• Partially threaded design allows for controlled clamping force and prevents over-tightening in assembly operations
• Standard Phillips No. 4 drive offers familiar, efficient installation with common tools across various work environments
• Full regulatory compliance with ASME B18.6.3, RoHS 3, and REACH standards ensures workplace safety and environmental responsibility

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver critical engineering solutions where surface-flush fastening meets industrial durability requirements. The zinc-plated steel construction provides essential corrosion protection for machinery, equipment frames, and structural assemblies exposed to environmental elements. With Rockwell B70 hardness and 60,000 psi tensile strength, these partially threaded screws maintain integrity under vibration and load stress in automotive, manufacturing, and construction applications. The coarse UNC thread pattern ensures rapid installation and secure holding power in various materials, while the standard 82° countersink angle guarantees proper seating in prepared holes. These flat head Phillips screws solve common assembly challenges by combining reliable fastening performance with regulatory compliance for industrial procurement specifications.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. Thread specifications include 3/8"-16 UNC coarse thread pattern with right-hand orientation and minimum 1-1/2" thread length. Full compliance with ASME B18.6.3 manufacturing standards ensures dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions, supporting sustainable procurement practices in industrial supply chains.