S-90002A128 1/2"-13 x 3 1/2" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification
High-Strength Steel Hex Head Screws with Material Certification
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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 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that extends service life in harsh environments
- Optimized clamping force distribution with partial threading design that prevents joint loosening under vibration
- Precise thread engagement with Class 2A thread fit ensuring consistent installation and removal cycles
- Enhanced durability from Rockwell C33 hardness that maintains structural integrity under repeated loading
- Industry-standard compatibility with UNC coarse threads for quick installation and broad application range
- Secure torque transmission through external hex drive design that prevents tool slippage during tightening
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for industrial applications where high tensile strength and corrosion resistance are paramount. The 1/2"-13 UNC coarse thread configuration provides excellent engagement in various materials while the zinc yellow-chromate plating creates a protective barrier against environmental degradation. Particularly valuable in construction equipment, heavy machinery, and structural assemblies, these partially threaded fasteners concentrate clamping force precisely where needed, preventing joint failure in vibrating environments. The external hex drive enables high-torque installation with standard tools, making them ideal for maintenance and manufacturing operations requiring reliable, high-performance steel fasteners.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 and SAE J429 specifications governing dimensional requirements and mechanical properties. The UNC coarse thread pattern follows standardized inch system measurements with 1/2"-13 thread size and 3 1/2" overall length. Meets industry standards for Grade 8 fastener strength classification with verified 150,000 psi tensile strength and Rockwell C33 hardness properties.
