S-91236A898 7/8"-9 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 that protects against rust 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 wear and deformation
- External hex drive design allows for easy installation and removal with standard tools
- Coarse UNC threading offers faster assembly and reduced cross-threading risks
- Class 2A thread fit ensures consistent, precise engagement for secure fastening
- Partial threading provides optimal grip and clamping force in structural applications
Professional Applications & Engineering Value
This 7/8"-9 UNC hex head screw is engineered to address critical challenges in heavy machinery, construction, and infrastructure projects where vibration resistance and long-term reliability are paramount. The high-strength steel construction combined with zinc plating creates a robust fastener that withstands harsh environmental conditions while maintaining structural integrity. The coarse thread design enables quicker installation in tough materials, reducing labor time without compromising holding power. Particularly valuable in applications requiring ASME B18.2.1 compliance, this partially threaded hex screw delivers predictable performance in critical joints and connections, minimizing the risk of unexpected failures in industrial equipment and structural assemblies.
Specification Summary & Compliance
This heavy-duty fastener features precise Class 2A thread fit tolerances and UNC coarse threading (7/8"-9) in accordance with ASME standards. Manufacturing specifications comply with ASME B18.2.1 and material standards meet ASTM A307 requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while maintaining dimensional accuracy and mechanical properties.
