S-94288A528 1/2"-13 x 4" Extreme-Strength Stainless Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 450 stainless steel construction for long-term reliability in harsh environments
• Superior load-bearing capacity with 170,000 PSI tensile strength to withstand extreme mechanical stress
• Enhanced driving efficiency through external hex drive design for secure tool engagement and torque transmission
• Built-in load distribution with integrated flange that eliminates need for separate washers
• Optimized thread engagement with Class 2A thread fit ensuring consistent assembly performance
• Reduced cross-threading risk through coarse UNC threading for faster installation in industrial applications
• Partial threading design providing both gripping power and clearance where needed

Professional Applications & Engineering Value

These 450 stainless steel hex head screws deliver critical performance advantages for industrial applications where corrosion resistance and structural integrity are paramount. The external hex drive configuration ensures maximum torque transmission during installation, while the coarse UNC threading with Class 2A fit provides reliable engagement in materials where vibration resistance is essential. The integrated flange design distributes clamping force over a wider surface area, making these partially threaded screws ideal for machinery assembly, structural frameworks, and heavy equipment where both precision fit and corrosion protection are required. The combination of Rockwell C38 hardness and 170,000 PSI tensile strength ensures these fasteners maintain integrity under sustained mechanical loads.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 1/2"-13 UNC coarse threading and Class 2A thread fit tolerance. Features include 4" length with 1 1/4" minimum thread length, 9/16" head width, 15/32" head height, and 27/32" flange diameter. These 450 stainless steel hex head screws comply with industry standards for material composition and mechanical properties, suitable for applications requiring reliable performance in demanding conditions.