S-92620A402 4-40 x 3/8" SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 capability with 150,000 psi tensile strength for reliable performance in high-stress environments
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in demanding conditions
- Optimal hardness and durability with Rockwell C33 rating, preventing deformation under heavy loads
- Precise thread engagement through Class 2A thread fit, ensuring secure fastening and vibration resistance
- Enhanced installation efficiency with external hex drive design, allowing for high torque application
- Full-threaded design for maximum grip length and uniform stress distribution across the entire fastener
- Industry-standard compliance meeting SAE J429 specifications for guaranteed quality and interchangeability
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions for heavy-duty industrial applications where failure is not an option. The combination of high-strength steel material and zinc yellow-chromate plating addresses common challenges in machinery, automotive, and construction sectors where corrosion and extreme mechanical stress compromise fastener integrity. The 4-40 UNC coarse thread configuration provides excellent engagement in various materials while resisting loosening from vibration. With fully threaded design and external hex drive, these screws offer maximum clamping force and straightforward installation in confined spaces, making them ideal for critical assemblies requiring 150,000 psi tensile strength and long-term reliability.
Specification Summary & Compliance
This Grade 8 hex head screw features precise Class 2A thread fit with 4-40 UNC coarse thread specifications, ensuring proper clearance and engagement. Manufacturing complies with SAE J429 standards for dimensional accuracy and mechanical properties. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection. With 3/8" length and fully threaded construction, these fasteners maintain consistent performance across industrial applications requiring verified strength and durability.
