S-91772A507 2-56 x 1 1/8" 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 for extended service life in harsh environments
• High tensile strength of 70,000 psi ensures reliable fastening performance under demanding mechanical loads
• Fully threaded design provides maximum grip and uniform stress distribution across the entire fastener length
• Coarse UNC thread profile enables quick installation and superior resistance to vibration loosening
• Class 2A thread fit guarantees consistent mating with standard nuts and threaded components
• Phillips No. 1 drive system offers secure tool engagement and efficient installation with common drivers
• Rounded pan head profile combines low-profile aesthetics with practical bearing surface for diverse applications

Professional Applications & Engineering Value

These 2-56 UNC rounded pan head screws deliver exceptional engineering value across industrial applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides critical protection against chemical exposure and atmospheric corrosion, making them ideal for electronic enclosures, machinery assemblies, and outdoor equipment. The coarse thread design ensures rapid installation in production environments while maintaining vibration resistance in dynamic systems. With their fully threaded configuration and Phillips drive compatibility, these fasteners offer consistent clamping force and tool accessibility in confined spaces, addressing common assembly challenges in manufacturing, automotive, and industrial maintenance applications where durability and compliance standards are non-negotiable.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance ensuring precise dimensional accuracy and interchangeability. These 2-56 UNC coarse thread screws feature standardized rounded pan head geometry and Phillips No. 1 drive configuration. The fasteners are fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions, making them suitable for global industrial supply chains requiring verified material safety and environmental responsibility.