S-91247A724 1/2"-13 x 3" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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
- Enhanced load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Optimized thread engagement with UNC coarse threads and Class 2A fit ensuring secure fastening and vibration resistance
- Efficient installation and removal via external hex drive and 3/4" head width for standard tool compatibility
- Controlled thread distribution with partial threading providing unthreaded shank for precise clamping force
- Industry-standard compliance meeting ASME B18.2.1 specifications for consistent quality and interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe usage across global markets
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 5 hex head screw delivers exceptional mechanical performance where structural integrity is paramount. The zinc plated steel construction provides critical corrosion protection in manufacturing facilities, construction sites, and machinery assembly environments. The 1/2"-13 UNC coarse thread design combined with partial threading prevents joint loosening under dynamic loads while the external hex drive enables high-torque installation. These industrial fasteners solve common engineering challenges including vibration-induced failure, material degradation, and assembly inconsistency through standardized ASME B18.2.1 compliance and precise Class 2A thread fit.
Specification Summary & Compliance
This fastener maintains Class 2A thread tolerance per UNC standards with 1/2"-13 coarse thread spacing and 1-1/4" minimum thread length. Manufacturing conforms to ASME B18.2.1 specifications (referencing SAE J429) with material properties including Rockwell C25 hardness. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring global market acceptance for industrial and construction applications.
