S-91735A410 5/16"-18 x 3/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
• Optimized thread engagement through UNC coarse spacing and Class 2A thread fit, ensuring secure fastening in various materials
• Enhanced drive stability with Phillips No. 4 drive style, reducing cam-out risks during installation
• Full-threaded design providing consistent clamping force along the entire 3/4" length for uniform stress distribution
• Standard-compliant manufacturing meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
• Environmental compliance with RoHS 3 and REACH regulations, ensuring safe use in regulated industries

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 316 stainless steel rounded head screws deliver exceptional performance in corrosive environments where standard fasteners fail. The passivated finish creates a protective oxide layer that significantly enhances resistance to chemicals, saltwater, and industrial atmospheres. With UNC coarse threading and Class 2A thread fit, these screws provide rapid installation and reliable holding power in soft metals, plastics, and wood substrates. The pan head profile with Phillips drive offers a balanced combination of low-profile design and efficient torque transmission, making them ideal for assembly lines, marine equipment, food processing machinery, and chemical processing plants where corrosion resistance and mechanical reliability are critical.

Specification Summary & Compliance

This 5/16"-18 UNC screw features precise Class 2A thread fit tolerances and coarse thread spacing for optimal performance. Manufacturing complies with ASME B18.6.3 standards ensuring dimensional accuracy and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. Full threading along the 3/4" length maintains consistent engagement, while the rounded pan head design provides a finished appearance with practical installation benefits.