S-91735A013 2-56 x 5/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 316 stainless steel construction, ideal for harsh chemical and marine environments
• High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable performance under stress
• Superior thread engagement with Class 2A thread fit and coarse UNC threading for faster assembly and vibration resistance
• Enhanced durability through passivated surface finish that increases corrosion protection and extends service life
• Optimized drive performance with Phillips No. 1 drive style providing secure torque transmission and reduced cam-out risk
• Full threading capability along the entire 5/16" length ensures maximum grip strength in various material thicknesses
• Regulatory compliance assurance meeting ASME B18.6.3 manufacturing standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 316 stainless steel rounded head screws deliver exceptional value in demanding industrial applications where corrosion resistance and mechanical reliability are critical. The combination of fully threaded UNC coarse threading and Class 2A thread fit ensures rapid installation and secure fastening in materials prone to vibration loosening. The passivated finish significantly enhances the natural corrosion resistance of 316 stainless steel, making these pan head screws ideal for chemical processing equipment, marine hardware, food processing machinery, and medical devices. The Phillips No. 1 drive provides efficient torque transfer while the rounded head profile offers a finished appearance and prevents snagging in assembled products.

Specification Summary & Compliance

This 2-56 UNC screw features precise Class 2A thread fit tolerances with right-hand threading and coarse thread spacing. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. With dimensions of 5/16" length, 0.167" head diameter, and complete threading, these screws maintain consistent quality for industrial applications requiring reliable fastening solutions.