S-90585A067 3/8"-24 x 1" ASME B18.3 Stainless Steel Hex Drive Flat Head 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 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A fit and UNF fine threads ensuring secure, vibration-resistant connections
• Optimized flush mounting featuring a standard 82° countersink angle and flat head design for smooth, unobtrusive surface finishes
• Efficient installation and removal with a 7/32" hex drive providing positive torque transfer and reducing tool slippage
• Full threading along the 1" length for maximum grip and adjustability in a wide range of material thicknesses
• Regulatory compliance assurance meeting ASME B18.3 standards and being RoHS 3 & REACH compliant for global supply chain integration

Professional Applications & Engineering Value

This 3/8"-24 UNF flat head screw is engineered to address critical challenges in industrial assembly where corrosion resistance, high strength, and precise fit are paramount. The 316 Stainless Steel material, enhanced by a passivated finish, provides exceptional protection against chemical and saltwater exposure, making it ideal for marine, chemical processing, and food industry applications. The fine UNF threads and Class 3A thread fit deliver superior vibration resistance and clamping force retention in dynamic or high-stress environments. With its fully threaded design and 82° countersink angle, it ensures a flush, secure fit in pre-drilled holes, eliminating protrusions and improving aerodynamic or aesthetic surfaces. The hex drive design facilitates quick installation with standard tools, reducing assembly time and enhancing productivity in automated or manual fastening processes.

Specification Summary & Compliance

This flat head screw features precise dimensional tolerances, including a head diameter of 0.781" with a tolerance of -0.061" to 0", and a Class 3A thread fit for high-precision applications. It conforms to ASME B18.3 specifications for dimensional and mechanical requirements. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated markets. Manufactured in the inch system, it guarantees interoperability with North American and international standards.