S-90585A710 1/2"-13 x 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction and passivated finish
• Superior thread engagement and vibration resistance with Class 3A precision thread fit and coarse UNC threading
• High mechanical strength supporting demanding applications with 70,000 psi tensile strength and Rockwell B55 hardness
• Reliable flush mounting enabled by standard 82° countersink angle and flat head design
• Secure installation and removal through hex drive (5/16") compatibility with standard tools
• Full-length fastening capability provided by completely threaded shank for consistent grip
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS 3/REACH)

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel flat head screws deliver critical performance where corrosion resistance and mechanical integrity are paramount. The Class 3A thread fit ensures precise engagement in UNC coarse thread applications, reducing the risk of cross-threading while maintaining vibration resistance in machinery, structural assemblies, and marine equipment. The passivated finish provides an additional protective layer against chemical exposure and oxidation, while the 82° countersink enables seamless flush mounting in precision-machined components. With full threading along the entire 3/4" length, these hex drive screws offer uniform clamping force distribution, making them ideal for high-stress fastening applications across manufacturing, chemical processing, and offshore industries.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit tolerance for superior precision. Thread configuration follows 1/2"-13 UNC coarse thread standards with fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include 70,000 psi tensile strength and Rockwell B55 hardness for guaranteed performance in industrial applications.