S-90201A333 3/8"-16 x 3 1/2" 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
- Enhanced durability with Rockwell C38 hardness, maintaining structural integrity under repeated stress
- Secure fastening engagement through Class 2A thread fit and coarse UNC threading for vibration resistance
- Easy installation and removal with external hex drive design and standard 9/16" head width
- Optimized weight distribution with partial threading design for balanced strength and flexibility
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
These Grade 9 hex head screws deliver critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where failure is not an option. The steel construction combined with 180,000 psi tensile strength addresses common challenges of joint separation and material fatigue in high-vibration environments. The zinc yellow-chromate plating provides essential protection against corrosion in manufacturing facilities, outdoor applications, and chemical exposure scenarios. With 3/8"-16 UNC coarse threading and partial threading design, these fasteners offer superior grip strength while preventing overtightening damage. The external hex drive ensures compatibility with standard industrial tools, streamlining installation in confined spaces and high-production environments where reliability and speed are paramount.
Specification Summary & Compliance
This 3-1/2" hex head screw features precise Class 2A thread fit with 3/8"-16 UNC coarse threads and right-hand threading direction. Manufacturing adheres to Grade 9 strength classification with verified Rockwell C38 hardness and 180,000 psi tensile strength. The fastener is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental regulatory adherence for industrial distribution and use. Physical dimensions include 9/32" head height, 9/16" head width, and minimum 1" thread length on the partially threaded shank.
