S-99926A161 3/8"-16 x 2 1/2" 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, ideal for harsh industrial environments.
• Superior fastening strength and reliability from a 70,000 psi tensile strength and Rockwell B70 hardness, preventing stripping and failure.
• Precise, vibration-resistant fit due to the Class 3A thread fit and UNC coarse thread profile, ensuring secure connections.
• Flush, professional installation enabled by the 100° countersink angle and undercut flat head design for a smooth surface finish.
• High-torque installation capability with the 7/32" hex drive, allowing for efficient assembly with standard tools.
• Optimized thread engagement and weight savings through the partially threaded design, providing focused holding power.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe and responsible sourcing.

Professional Applications & Engineering Value

This 3/8"-16 UNC Flat Head Screw is engineered to address critical challenges in demanding industrial applications. The 18-8 Stainless Steel material, enhanced by a passivated finish, provides excellent resistance to oxidation and chemical exposure, significantly extending service life in corrosive settings. The combination of a Class 3A thread fit and coarse UNC threading ensures rapid assembly and a secure, vibration-resistant joint, reducing maintenance needs in machinery and structural frameworks. The undercut flat head with its 100° countersink angle sits perfectly flush, eliminating protrusions for safer operation and a cleaner aesthetic in finished products like metal fabrication, automotive assemblies, and heavy-duty equipment.

Specification Summary & Compliance

This screw adheres to the Inch system with a 3/8"-16 UNC coarse thread and a high-precision Class 3A thread fit. Key dimensional attributes include a length of 2 1/2" and a thread length of at least 2.3". It is manufactured to be fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global markets with strict environmental and safety standards.