S-91236A978 5/8"-11 x 14" 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
- Exceptional tensile strength of 60,000 psi ensures reliable performance in demanding industrial applications
- Zinc plating provides superior corrosion resistance, extending service life in various environmental conditions
- Coarse UNC threading with Class 2A fit offers faster installation and reduced cross-threading risk
- External hex drive design enables high-torque application with standard tools for efficient assembly
- Partial threading configuration provides optimal grip strength while minimizing material usage
- Heavy-duty 14" length accommodates thick material assemblies and structural applications
- Rockwell B69 hardness rating ensures durability and resistance to deformation under load
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 pattern ensures rapid installation in structural steel, heavy machinery, and construction applications where vibration resistance is critical. The partial threading design concentrates tensile strength where needed most, while the external hex drive accommodates high-torque applications without stripping. Engineered to ASME B18.2.1 standards with ASTM A307 compliance, this fastener provides reliable performance in demanding environments where failure is not an option, from industrial equipment assembly to infrastructure projects requiring 60,000 psi tensile strength and consistent mechanical properties.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit tolerances with UNC coarse threading (5/8"-11) and meets ASME B18.2.1 dimensional specifications. Manufactured according to ASTM A307 standards for carbon steel bolts, it ensures consistent mechanical properties including Rockwell B69 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, making it suitable for various industrial and commercial applications with environmental considerations.
