S-90909A213 3/8"-16 x 2" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments.
• Superior mechanical strength with a 70,000 psi tensile strength and Rockwell B70 hardness for reliable, long-term performance under high stress.
• Precise, secure fastening ensured by the Class 3A thread fit and UNC coarse thread, reducing the risk of cross-threading and loosening.
• Enhanced durability and surface protection from the passivated finish, which increases resistance to corrosion and wear.
• Efficient installation and removal with the 7/32" hex drive and wide button head design, providing a firm grip and reducing tool slippage.
• Increased bearing surface and stability from the integrated flange, distributing load more effectively and preventing pull-through.
• Full thread engagement along the 2" length for maximum grip and holding power in a wide range of material thicknesses.

Professional Applications & Engineering Value

This 316 Stainless Steel flanged rounded head screw is engineered to solve critical challenges in demanding industrial settings. Its high corrosion resistance makes it a top choice for applications in chemical processing, marine equipment, and food processing machinery, where exposure to moisture and aggressive substances is common. The Class 3A UNC coarse thread and fully threaded design ensure rapid assembly and a secure fit in coarse-grained materials, reducing installation time and minimizing the risk of thread stripping. The combination of a wide button head and integral flange provides an enlarged bearing surface, which helps prevent surface damage and maintains clamp force under vibration. With a 70,000 psi tensile strength and passivated finish, this hex drive screw delivers reliable performance in structural applications, outdoor installations, and heavy machinery, where both strength and longevity are paramount.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a precise Class 3A thread fit for superior dimensional accuracy. It is manufactured from 316 Stainless Steel with a passivated finish and features a fully threaded 3/8"-16 thread size and a 2" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.