S-92210A621 3/8"-16 x 5/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Superior load-bearing capability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening
• Precise, vibration-resistant installation ensured by Class 3A thread fit and UNC coarse threading for secure connections
• Efficient assembly and removal with hex drive design providing positive torque transmission and reduced tool slippage
• Flush, low-profile seating with standard 82° countersink angle flat head, minimizing protrusion in assembled components
• Full-thread engagement along the entire 5/8" length, maximizing grip strength and distribution of clamping force
• Regulatory peace of mind with compliance to ASME B18.3, RoHS 3, and REACH, meeting stringent industry and environmental standards

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 3/8"-16 UNC flat head screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The 18-8 stainless steel material, enhanced by a passivated finish, provides robust resistance to oxidation and chemical exposure, extending service life in corrosive settings. The hex drive and coarse thread design facilitate quick installation and high torque application, reducing assembly time while maintaining joint integrity. With a Class 3A thread fit, these screws ensure tight tolerances that prevent loosening under dynamic loads, making them ideal for heavy-duty uses where vibration resistance is paramount. The fully threaded configuration and 82° countersink enable seamless integration into angled surfaces, offering a reliable solution for flush-mount requirements in automotive, aerospace, and construction sectors.

Specification Summary & Compliance

This flat head screw adheres to precise dimensional standards, including UNC coarse threads with a Class 3A fit for superior thread engagement and tolerance control. Manufacturing follows ASME B18.3 specifications, ensuring consistency and interoperability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting environmental safety in industrial supply chains.