S-90002A126 1/2"-13 x 2 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
- Maximum load-bearing capability with 150,000 psi tensile strength for critical structural applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
- Precise thread engagement with Class 2A fit ensuring consistent performance and reduced assembly issues
- Optimized torque transmission via external hex drive design for secure installation with standard tools
- Enhanced durability from Rockwell C33 hardness, maintaining integrity under repeated stress
- Reliable partial threading design providing both gripping power and clearance where needed
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial environments where failure is not an option. The 1/2"-13 UNC coarse thread configuration provides excellent engagement in various materials while resisting vibration-induced loosening. The zinc yellow-chromate plating creates a protective barrier against corrosion, making these steel fasteners ideal for outdoor equipment, machinery assemblies, and structural frameworks exposed to moisture or chemicals. The partially threaded design allows for precise clamping force distribution, preventing joint slippage in heavy-load applications. With 150,000 psi tensile strength and Rockwell C33 hardness, these screws maintain integrity under extreme mechanical stress, reducing maintenance frequency and downtime in industrial operations.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances for consistent performance, these 1/2"-13 UNC coarse thread screws comply with ASME B18.2.1 and SAE J429 specifications. The 2 1/2" length with 1 1/4" minimum thread length ensures proper engagement depth. The external hex drive with 3/4" head width and 5/16" head height provides optimal tool clearance. These industrial fasteners meet standard compliance requirements for quality assurance in professional applications.
