S-92210A131 5-40 x 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Superior thread engagement and vibration resistance due to Class 3A thread fit, providing secure, precise fastening in demanding applications.
• High tensile strength of 70,000 psi delivers reliable performance under heavy loads, reducing the risk of fastener failure.
• Optimized flush mounting with an 82° countersink angle and standard flat head profile for a smooth, professional finish.
• Easy installation and removal with a 5/64" hex drive, allowing for efficient assembly and maintenance.
• Full threading along the 3/4" length ensures maximum grip and holding power across the entire fastener.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.

Professional Applications & Engineering Value

These 5-40 UNC flat head screws are engineered to address critical fastening challenges in industrial settings. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, making them ideal for applications in manufacturing, machinery, and outdoor equipment where exposure to moisture or chemicals is a concern. The Class 3A thread fit and coarse thread spacing ensure quick assembly and reliable performance in high-vibration environments, reducing maintenance needs. With a hex drive design, installation is straightforward, saving time and labor costs. These screws are commonly used in aerospace, automotive, and electronics industries, where precision, durability, and compliance with standards like ASME B18.3 are essential for operational safety and efficiency.

Specification Summary & Compliance

This screw features a 5-40 UNC thread size with Class 3A thread fit for precise dimensional accuracy and tight tolerances. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. Additional details include a right-hand thread direction, fully threaded design, and mechanical properties such as Rockwell B55 hardness and 70,000 psi tensile strength, supporting consistent performance in industrial applications.