S-91773A267 2-56 x 1 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction and a passivated finish, ensuring long-term reliability in harsh environments.
• Superior mechanical strength with a 100,000 psi tensile strength and Rockwell B100 hardness for dependable performance under high-stress conditions.
• Reliable and precise fastening achieved with a Class 2A thread fit and UNC coarse thread profile, reducing the risk of cross-threading and enabling quick assembly.
• Optimized drive engagement via the Phillips No. 1 drive and rounded head design, providing secure torque transmission and a flush, low-profile installation.
• Full-threaded length of 1-1/2 inches ensures maximum grip and holding power across the entire fastener, ideal for thicker materials.
• Compliance with rigorous industry standards including ASME B18.6.3 for dimensional consistency, meeting the demands of precision engineering applications.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, supporting your green procurement and regulatory requirements.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 2-56 UNC Rounded Head Phillips Screw provides a robust fastening solution where corrosion resistance and high tensile strength are critical. The 18-8 Stainless Steel material, enhanced by a passivated finish, effectively combats oxidation and chemical exposure, making it ideal for electronics enclosures, machinery assemblies, and outdoor equipment. The coarse UNC thread and Class 2A fit ensure quick, secure installation with reduced risk of stripping, while the fully threaded 1-1/2" length offers consistent clamping force in deep or variable material thicknesses. Its rounded head and Phillips drive facilitate a clean, low-profile finish, essential for applications requiring both aesthetic appeal and mechanical integrity under vibration and load.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse thread profile, ensuring interchangeability and reliable performance. Manufactured in compliance with ASME B18.6.3 specifications, it guarantees consistency in head diameter, thread size, and overall geometry. The product meets essential environmental and safety regulations, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its suitability for global markets and sustainable industrial practices.