S-91500A304 2-56 x 3/4" ASME B18.6.3 Stainless Steel Phillips Flat Head 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 70,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision thread engagement ensured by Class 2A thread fit and UNC coarse threading for secure fastening
• Flush mounting capability with standard 82° countersink angle flat head design for smooth surface finishes
• Efficient installation using No. 1 Phillips drive that provides positive torque transfer and reduces cam-out
• Full threading coverage across the entire 3/4" length for maximum grip and holding power
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 316 stainless steel flat head screws deliver exceptional performance in demanding industrial environments where corrosion resistance and mechanical reliability are critical. The combination of fully threaded UNC coarse threading and Class 2A thread fit ensures secure fastening in applications ranging from marine equipment to chemical processing machinery. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making these Phillips drive screws ideal for applications exposed to moisture, chemicals, and temperature variations. The 82° countersink angle provides flush mounting in precision assemblies, while the 70,000 psi tensile strength guarantees structural integrity in high-stress applications. These industrial screws are engineered to solve common fastening challenges including vibration loosening, material degradation, and installation efficiency.

Specification Summary & Compliance

This 2-56 UNC flat head screw features precise Class 2A thread fit tolerance and coarse thread spacing per UNC standards. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations for environmental safety. Additional specifications include right-hand thread direction, standard flat head profile, and full threading along the 3/4" length.