S-91236A820 5/8"-11 x 7" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength 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
- Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent durability and resistance to deformation
- Coarse UNC threading enables faster installation and better performance in softer materials
- Class 2A thread fit offers optimal balance between easy assembly and secure fastening
- External hex drive design allows for high-torque installation with standard tools
- Partial threading provides unthreaded shank for precise clamping and shear strength
Professional Applications & Engineering Value
This heavy-duty hex head screw delivers exceptional engineering value through its steel construction and zinc plating, specifically designed to address common industrial fastening challenges. The 5/8"-11 UNC coarse thread configuration ensures rapid installation while maintaining strong holding power in structural applications, machinery assembly, and construction projects. The partially threaded design with 1 3/4" minimum thread length provides an unthreaded shoulder that enhances shear strength and prevents joint loosening under dynamic loads. The external hex drive accommodates high torque applications, making it ideal for heavy equipment, structural steel connections, and industrial machinery where reliable fastening solutions are critical for operational safety and longevity.
Specification Summary & Compliance
This 7" hex head screw features precise Class 2A thread fit with UNC coarse threading (5/8"-11) and right-hand thread direction. Manufactured to ASME B18.2.1 specifications using ASTM A307 grade steel, ensuring dimensional accuracy and mechanical properties. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety standards for industrial applications worldwide.
