S-91268A654 1/2"-13 x 4 1/2" ASME B18.2.1, 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 capacity with 150,000 psi tensile strength for reliable performance in demanding applications
- Superior wear resistance due to Rockwell C33 hardness, ensuring extended service life under harsh conditions
- Optimized thread engagement with partial threading design providing enhanced grip and vibration resistance
- Precise installation control through external hex drive and standard 3/4" head width for secure torque application
- Reliable coarse thread performance with UNC 1/2"-13 configuration enabling quick assembly in various materials
- Industry-standard compatibility meeting ASME B18.2.1 specifications for consistent quality and interchangeability
- Environmental compliance assurance with RoHS 3 and REACH compliance for sustainable industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional reliability in construction, machinery assembly, and structural frameworks. The steel construction combined with Rockwell C33 hardness provides superior resistance to shear forces and environmental degradation. The 1/2"-13 UNC coarse threading ensures rapid installation in steel, wood, and composite materials while maintaining Class 2A thread fit precision for consistent clamping force. The partial threading design concentrates strength where needed most, preventing thread stripping and maintaining 150,000 psi tensile strength under extreme loads. These external hex drive screws are specifically designed for applications requiring repeated disassembly and reassembly without performance degradation.
Specification Summary & Compliance
Manufactured to exacting ASME B18.2.1 specifications and SAE J429 Grade 8 requirements, these hex head screws feature Class 2A thread fit tolerances for precise engagement. The 4 1/2" length with 1 1/4" minimum thread length provides optimal fastening capability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility. The inch system measurement guarantees compatibility with North American industrial standards and equipment.
