S-91735A003 2-56 x 1/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh chemical and marine environments.
• Reliable fastening performance due to Class 2A thread fit and coarse UNC thread, ensuring easy assembly and vibration resistance.
• High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for durable, long-lasting connections.
• Optimized drive engagement featuring a Phillips No. 1 drive and rounded pan head for efficient installation and reduced cam-out.
• Full thread coverage along the 1/8" length provides maximum grip and uniform stress distribution in thin materials.
• Compliance with major industry standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
• Versatile head design with a standard rounded pan profile for a low-profile, aesthetically clean finish in assembled products.

Professional Applications & Engineering Value

This 2-56 UNC Rounded Pan Head Phillips Machine Screw in 316 Stainless Steel is engineered to address critical challenges in corrosive and high-stress environments. The passivated finish enhances the natural corrosion resistance of the material, making it suitable for applications in chemical processing, marine equipment, and food machinery where exposure to moisture and aggressive agents is common. The coarse thread and Class 2A fit facilitate quick, secure installation while maintaining alignment in assemblies subject to vibration. Its fully threaded design ensures consistent clamping force across the entire 1/8" length, preventing loosening in compact electronic enclosures, instrumentation, and precision mechanical systems. By combining high tensile strength with regulatory compliance, this screw reduces maintenance frequency and enhances product lifecycle in industrial and OEM settings.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances per UNC standards, ensuring precise and interchangeable fastening. Manufacturing conforms to ASME B18.6.3 specifications for dimensional accuracy and performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting global supply chain requirements.