S-91770A655 3/8"-16 x 1 1/2" 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
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Enhanced torque transmission through No. 4 Phillips drive design, preventing cam-out during installation
• Optimized load distribution with wide rounded truss head profile, reducing surface pressure and material damage
• Precision threading compatibility featuring UNC coarse threads with Class 2A fit for secure fastening in various materials
• Full-thread engagement capability along the entire 1-1/2" length, providing maximum grip strength
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations (RoHS 3, REACH)

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these passivated 18-8 stainless steel screws deliver exceptional performance in corrosive environments where reliability is critical. The rounded truss head design provides superior bearing surface distribution, preventing pull-through in softer materials while the UNC coarse threading ensures rapid installation and secure fastening in wood, plastic, and metal assemblies. With full threading along the entire 1-1/2" length, these fasteners maintain consistent clamping force across the entire engagement area, making them ideal for machinery, electrical enclosures, and structural applications requiring high tensile strength and corrosion resistance. The combination of No. 4 Phillips drive and precise manufacturing ensures consistent torque application without stripping, reducing installation time and improving assembly quality in production environments.

Specification Summary & Compliance

This 3/8"-16 UNC fully threaded screw maintains precision Class 2A thread fit tolerances for consistent performance across applications. Manufactured in compliance with ASME B18.6.3 standards for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use across various industries. The right-hand coarse threading with 16 threads per inch provides optimal engagement in most industrial materials while maintaining the specified tensile strength and hardness characteristics throughout the fastener's service life.