S-99926A154 3/8"-16 x 3/4" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable, heavy-duty fastening.
• Precise, secure thread engagement with Class 3A fit and UNC coarse threads, ensuring vibration resistance and easy assembly.
• Optimized flush mounting featuring a 100° countersink angle and undercut flat head for a clean, recessed finish.
• Efficient installation and removal using a standard 7/32" hex drive, reducing tool slippage and assembly time.
• Durable partial threading (minimum 0.55") providing strong grip where needed while minimizing material use.
• Compliance with global regulations, including RoHS 3 and REACH, for safe use in regulated industries.

Professional Applications & Engineering Value

This 3/8"-16 UNC flat head screw is engineered to address critical challenges in machinery, automotive, and structural assemblies where flush mounting and high tensile strength are paramount. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, extending service life in demanding conditions. The undercut flat head profile and 100° countersink angle ensure a secure, non-protruding fit, preventing snagging and improving aerodynamic or aesthetic surfaces. With a Class 3A thread fit and coarse thread spacing, it offers superior holding power against vibrations, making it ideal for heavy-duty fasteners in dynamic load applications. The hex drive design allows for high torque application, reducing the risk of stripping and enhancing installation efficiency in confined spaces.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. It features a 3/8"-16 thread size, 3/4" length, and partial threading with a minimum thread length of 0.55". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.