S-91772A073 2-56 x 5/32" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions.
• Precise Class 2A thread fit ensures smooth assembly and secure fastening, reducing the risk of cross-threading and improving installation efficiency.
• Optimized drive engagement with Phillips No. 1 drive and pan head design, providing excellent torque transmission and reduced cam-out during installation.
• Full threading along the 5/32" length allows for maximum grip and uniform stress distribution in various material thicknesses.
• Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety, reliability, and environmental responsibility.
• Coarse UNC thread spacing enables quick installation and removal, making it suitable for applications requiring frequent maintenance or adjustments.

Professional Applications & Engineering Value

Engineered for demanding industrial and commercial applications, these 2-56 UNC machine screws provide a robust fastening solution where corrosion resistance and mechanical integrity are critical. The passivated 18-8 stainless steel material effectively resists oxidation and chemical exposure, extending service life in environments like marine, chemical processing, and food equipment. The rounded pan head with Phillips drive offers a low-profile, secure fit that minimizes protrusion while ensuring efficient installation with standard tools. Combined with a Class 2A thread fit and coarse thread spacing, these screws deliver reliable performance in assemblies requiring vibration resistance and repeated disassembly, such as electronic enclosures, machinery panels, and automotive components. Their full threading and high tensile strength help prevent loosening and maintain clamp load under dynamic loads.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances per UNC standards, ensuring dimensional accuracy and interchangeability. It is manufactured in compliance with ASME B18.6.3 specifications for machine screws, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming it is free of hazardous substances and safe for various industrial uses.