S-91770A073 2-56 x 5/16" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced load distribution through wide truss head design, reducing surface damage and improving joint integrity
• High tensile strength of 70,000 psi ensures reliable performance under substantial mechanical stress
• Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use
• Full threading with Class 2A fit delivers consistent engagement and secure fastening in coarse UNC thread applications
• Easy installation with No. 1 Phillips drive, minimizing slippage and tool wear during assembly
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory adherence for global industrial use

Professional Applications & Engineering Value

These 2-56 UNC rounded truss head Phillips screws deliver exceptional engineering value in demanding applications where corrosion resistance and mechanical reliability are critical. The passivated 18-8 stainless steel construction effectively combats oxidation and chemical exposure, making them ideal for electronics enclosures, machinery assemblies, and outdoor equipment. The wide truss head design distributes clamping force over a larger surface area, preventing material deformation in softer substrates while the coarse thread configuration ensures rapid installation and superior holding power in various materials. With full threading and No. 1 Phillips drive, these screws provide consistent performance in automated assembly lines and maintenance operations, reducing installation time and improving production efficiency.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for reliable engagement in UNC coarse thread applications. These 5/16" length screws meet ASME B18.6.3 specifications for dimensional accuracy and performance requirements. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and unrestricted use in international markets. The combination of 70,000 psi tensile strength and Rockwell B70 hardness guarantees mechanical integrity across industrial applications.