S-90201A336 3/8"-16 x 4" Extreme-Strength Grade 9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 9 rating and 180,000 PSI tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh industrial environments
• Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
• Enhanced durability through Rockwell C38 hardness, maintaining structural integrity under repeated stress
• Efficient installation and removal with external hex drive design and 9/16" head width for standard tool compatibility
• Versatile partial threading allowing for precise clamping force distribution across the 4" length
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

These Grade 9 hex head screws deliver critical performance in high-stress industrial applications where fastener failure is not an option. The steel construction with Rockwell C38 hardness provides exceptional resistance to deformation under heavy loads, while the zinc yellow-chromate plating offers superior protection against corrosion in challenging environments. The 3/8"-16 UNC coarse thread configuration ensures rapid installation and reliable holding power in various materials, from structural steel to heavy machinery components. With partial threading along the 4" length, these external hex drive fasteners provide optimal clamp load distribution, making them ideal for construction equipment, industrial machinery, and transportation applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This heavy-duty hex screw features precise Class 2A thread fit per UNC standards with 3/8"-16 coarse threading and right-hand thread direction. The fastener maintains dimensional accuracy with a 9/16" head width and 9/32" head height for consistent tool engagement. Manufacturing compliance includes adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety standards are met for industrial applications worldwide.