S-90585A971 3/4"-10 x 3" 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 high stress
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring secure, vibration-resistant connections
• Optimized installation efficiency featuring a 1/2" hex drive and standard 82° countersink angle for flush mounting and easy torque application
• Full-length threading providing maximum grip and load distribution along the entire 3-inch length
• Rigorous quality assurance through compliance with ASME B18.3 specifications for dimensional accuracy and performance reliability
• Environmental and regulatory safety with RoHS 3 and REACH compliance, meeting global standards for hazardous substance restrictions

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 3/4"-10 UNC flat head screws address critical challenges in machinery assembly, structural frameworks, and marine equipment. The 316 Stainless Steel material, combined with a passivated finish, provides exceptional resistance to chlorides, acids, and oxidizing agents, preventing premature failure in corrosive settings. The coarse thread spacing and Class 3A thread fit enhance fatigue resistance and reduce the risk of loosening under dynamic loads. With a fully threaded design and high tensile strength, these screws ensure uniform stress distribution and reliable clamping force, making them suitable for heavy-duty fastening in construction, chemical processing, and transportation industries where durability and compliance with ASME B18.3 are paramount.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including a head diameter tolerance of -0.083" to 0" and Class 3A thread fit per UNC standards, ensuring consistent performance. Manufacturing and material specifications comply with ASME B18.3, while environmental regulations such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) are fully met, confirming the absence of restricted substances and supporting sustainable procurement practices.