S-91309A800 5/8"-11 x 1 3/4" 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-strength steel construction delivers reliable 60,000 psi tensile strength for heavy-duty applications
- Class 2A thread fit ensures precise, smooth assembly and consistent performance in UNC coarse threads
- External hex drive design provides secure tool engagement and efficient installation with common wrenching tools
- Full threading along the 1 3/4" length offers maximum grip and load distribution across connected materials
- Rockwell B69 hardness rating maintains structural integrity under high stress and repeated use
- Compliance with major industry standards including ASME B18.2.1 and ASTM A307 guarantees quality and interoperability
Professional Applications & Engineering Value
Engineered for industrial fastening solutions, this 5/8"-11 UNC hex head screw addresses critical needs in construction, machinery assembly, and structural applications where vibration resistance and joint integrity are paramount. The coarse thread design enables quicker installation and superior holding power in softer materials or where frequent disassembly isn't required. The zinc plated finish provides essential corrosion protection, reducing maintenance costs in humid or outdoor environments. With its external hex drive and fully threaded configuration, it ensures uniform stress distribution and eliminates the need for precise hole depth matching, streamlining production processes while maintaining 60,000 psi tensile strength for heavy-load scenarios.
Specification Summary & Compliance
This inch system fastener maintains Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Manufacturing follows ASME B18.2.1 and ASTM A307 specifications for consistent quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for various industrial and international markets.
