S-99926A156 3/8"-16 x 1 1/4" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, providing reliable performance under high-stress conditions.
• Precise and secure fastening achieved with Class 3A thread fit and UNC coarse thread, reducing the risk of cross-threading and ensuring consistent engagement.
• Efficient installation and removal enabled by the 7/32" hex drive, allowing for high torque application and reducing tool slippage.
• Flush and clean surface finish due to the undercut flat head design, which minimizes protrusion and improves aesthetic integration.
• Versatile partial threading offering optimal grip on specific material thicknesses, enhancing clamping force where needed.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.

Professional Applications & Engineering Value

This 3/8"-16 UNC flat head screw is engineered to address critical fastening challenges in demanding industrial applications. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, making it ideal for machinery, outdoor equipment, and chemical processing environments where moisture and corrosive agents are present. The hex drive design and coarse UNC threads ensure quick, secure installation with standard tools, reducing assembly time and preventing stripping. The undercut flat head sits flush with surfaces, eliminating snag points and contributing to a smoother, safer operational profile. These features collectively enhance equipment longevity, reduce maintenance frequency, and support efficient production workflows in sectors like automotive, construction, and heavy machinery.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including UNC coarse thread with Class 3A thread fit for superior accuracy and engagement. Key specifications include a 3/8"-16 thread size, 1-1/4" length, and partial threading up to a minimum of 0.8". The manufacturing process ensures compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting environmentally responsible procurement.