S-90201A321 3/8"-16 x 1 3/4" Extreme-Strength Grade 9 Steel Hex Head Screws
Extreme-Strength Grade 9 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 180,000 PSI tensile strength for reliable performance in demanding applications
- Superior corrosion resistance provided by zinc yellow-chromate plating that extends service life in harsh environments
- Optimized torque transmission through the external hex drive design for secure installation and removal
- Enhanced thread engagement with UNC coarse threading that resists vibration loosening and simplifies alignment
- Precise mechanical properties maintained through Rockwell C38 hardness for consistent performance under stress
- Reduced assembly weight through partial threading while maintaining full strength requirements
- Regulatory compliance assurance with RoHS 3 and REACH standards for global market acceptance
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 9 hex head screws deliver exceptional performance where failure is not an option. The steel construction combined with 180,000 PSI tensile strength provides critical structural integrity for machinery, construction equipment, and transportation systems. The zinc yellow-chromate plating offers superior corrosion protection in challenging environments, while the external hex drive ensures positive torque transmission during installation. With 3/8"-16 UNC coarse threading, these partially threaded screws provide optimal clamping force distribution and resistance to vibration-induced loosening. The Class 2A thread fit guarantees consistent engagement while accommodating minor misalignments, making them ideal for high-stress assembly applications requiring both precision and durability.
Specification Summary & Compliance
This 1 3/4" length hex head screw features 3/8"-16 UNC coarse threading with Class 2A thread fit for standardized compatibility. Manufactured to exacting standards with Grade 9 strength classification and Rockwell C38 hardness. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets while maintaining exceptional mechanical properties for industrial applications.
