S-90201A219 5/16"-18 x 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 high-stress applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding environments
- Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and vibration resistance
- Optimized drive efficiency through external hex design allowing high torque application and secure installation
- Enhanced durability from Rockwell C38 hardness maintaining structural integrity under repeated stress
- Full-threaded design offering maximum grip length and uniform stress distribution along the entire fastener
- Regulatory compliance with RoHS 3 and REACH standards ensuring environmental safety and global acceptance
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 9 hex head screws deliver exceptional performance in construction, machinery assembly, and structural frameworks where high tensile strength is critical. The zinc yellow-chromate plating provides superior corrosion protection, significantly extending service life in harsh environments while maintaining consistent thread engagement. With UNC coarse thread spacing and Class 2A thread fit, these fully threaded screws ensure rapid installation and reliable vibration resistance, reducing maintenance frequency and downtime. The external hex drive design facilitates high-torque application, making them ideal for automated assembly systems and tight-clearance applications where maximum durability and consistent performance are essential requirements.
Specification Summary & Compliance
These 5/16"-18 x 3/4" hex head screws feature Class 2A thread fit with UNC coarse thread spacing and right-hand thread direction, manufactured to precise dimensional standards. The fasteners comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet international safety and sustainability requirements for industrial applications.
