S-91735A113 4-40 x 3/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction with passivated finish
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
• Precision thread engagement with Class 2A UNC coarse threads ensuring consistent fastening in industrial assemblies
• Optimized drive efficiency through Phillips No. 1 drive design for secure torque transmission during installation
• Full-threaded design providing maximum grip length and uniform stress distribution across the entire 3/4" length
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Versatile pan head profile offering low-profile installation with rounded head design for various industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel rounded head screws deliver exceptional performance where corrosion resistance and mechanical reliability are critical. The combination of passivated finish and marine-grade stainless steel provides superior protection against chemical exposure, saltwater environments, and industrial contaminants. The 4-40 UNC coarse thread configuration ensures rapid installation and secure fastening in machinery, electrical enclosures, and marine equipment. With fully threaded design and Phillips drive, these screws maintain consistent clamping force while accommodating manufacturing tolerances in metal fabrication, HVAC systems, and chemical processing equipment where vibration resistance and long-term integrity are essential.

Specification Summary & Compliance

This rounded head screw features precision 4-40 UNC Class 2A threads with coarse thread spacing, manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance reliability. The 3/4" length provides optimal engagement depth for various material thicknesses. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across multiple industries, while the 80,000 psi tensile strength and Rockwell B85 hardness guarantee mechanical performance in demanding applications.