S-91247A730 1/2"-13 x 4 1/2" 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
- Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance through zinc plating extends service life in demanding environments
- Optimized grip and clamping force with partial threading design for secure fastening
- Precise Class 2A thread fit guarantees smooth installation and consistent engagement
- Heavy-duty Grade 5 steel construction provides excellent durability and Rockwell C25 hardness
- Standard-compliant engineering meets ASME B18.2.1 and SAE J429 specifications for quality assurance
- External hex drive design enables easy installation with standard tools and high torque application
Professional Applications & Engineering Value
This Grade 5 steel hex head screw delivers exceptional engineering value for industrial assembly applications where high tensile strength and corrosion resistance are critical. The 1/2"-13 UNC coarse thread configuration provides superior holding power in various materials, while the partial threading design ensures optimal clamping force distribution. The zinc plated finish protects against environmental degradation, making these industrial fasteners ideal for construction equipment, machinery assembly, and structural applications requiring heavy-duty performance. The external hex drive facilitates quick installation and removal with standard tools, reducing assembly time in production environments.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with 1/2"-13 UNC coarse thread specifications. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features Rockwell C25 hardness and 120,000 psi tensile strength consistent with Grade 5 classification for reliable performance in demanding applications.
