S-91735A105 4-40 x 7/16" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh environments and extended service life
• Exceptional mechanical strength offering 80,000 PSI tensile strength and Rockwell B85 hardness for reliable performance under high stress
• Optimized for efficient assembly featuring a Phillips No. 1 drive and rounded pan head for secure, non-slip fastening and reduced installation time
• Precision thread engagement with Class 2A fit and coarse UNC 4-40 threads ensuring consistent, vibration-resistant connections
• Full threading along the 7/16" length provides maximum grip and uniform clamping force across the entire fastener
• Compliance with major industry standards including ASME B18.6.3 for dimensional consistency and RoHS 3/REACH for environmental safety
• Versatile right-hand thread design suitable for a wide range of industrial applications requiring standard directional fastening

Professional Applications & Engineering Value

These 4-40 UNC rounded head Phillips screws are engineered to address critical challenges in industrial settings where corrosion and mechanical stress are prevalent. The 316 Stainless Steel material, enhanced by a passivated finish, provides outstanding resistance to chemicals, moisture, and oxidation, making these screws ideal for marine, chemical processing, and food equipment applications. The coarse thread design and Class 2A thread fit ensure quick installation and secure holding power, reducing the risk of cross-threading and loosening under vibration. With a fully threaded shank and 80,000 PSI tensile strength, they deliver uniform load distribution and durability in assemblies requiring high reliability and compliance with ASME B18.6.3 specifications.

Specification Summary & Compliance

This product adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse thread system (4-40 size), ensuring compatibility and performance consistency. Manufacturing complies with ASME B18.6.3 for mechanical and dimensional requirements. Environmental and safety regulations are met, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming the absence of restricted substances for sustainable and safe industrial use.