S-91309A804 5/8"-11 x 2 1/2" 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 for extended 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 wear and deformation
- Class 2A thread fit offers optimal assembly efficiency while maintaining secure fastening
- External hex drive design allows for easy installation and removal with standard tools
- Full threading ensures maximum grip length and uniform stress distribution
- Coarse UNC thread pattern enables quick assembly and reduced cross-threading risks
Professional Applications & Engineering Value
This 5/8"-11 UNC hex head screw delivers exceptional engineering value for industrial applications requiring robust fastening solutions. The high-strength steel construction combined with zinc plating addresses critical challenges in corrosive environments, preventing premature failure in machinery, structural assemblies, and heavy equipment. The coarse thread design and Class 2A thread fit significantly reduce installation time while maintaining precise tolerance control, making these external hex drive fasteners ideal for construction, manufacturing, and maintenance operations where reliability and quick assembly are paramount. The full threading ensures consistent clamping force distribution across the entire fastener length, eliminating weak points in critical joints.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with UNC coarse threads measuring 5/8"-11. Manufactured to exacting standards including ASME B18.2.1 and ASTM A307 specifications, ensuring dimensional accuracy and performance consistency. The fastener is fully RoHS 3 (2015/863/EU) Compliant for environmental safety and regulatory adherence. With dimensions of 2-1/2" length, 15/16" head width, and right-hand threading, this industrial-grade fastener meets rigorous quality requirements for professional applications.
