S-91309A914 1"-8 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 that protects against rust in demanding industrial environments
- Exceptional tensile strength of 60,000 PSI ensures reliable performance under heavy loads and high-stress applications
- Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
- Fully threaded UNC coarse thread design offers faster installation and superior grip in various materials
- External hex drive with 1 1/2" head width allows for easy installation and removal with standard tools
- Class 2A thread fit ensures consistent, reliable engagement with standard nuts and threaded holes
- Compliance with major industry standards including ASME B18.2.1 and ASTM A307 guarantees quality and interoperability
Professional Applications & Engineering Value
This 1"-8 UNC hex head screw delivers exceptional engineering value for heavy-duty industrial applications where reliability is critical. The Grade A307 steel construction combined with zinc plating provides outstanding corrosion resistance, making these hex head fasteners ideal for outdoor equipment, structural assemblies, and machinery that face harsh environmental conditions. The coarse thread design ensures superior holding power in softer materials and faster installation times, while the external hex drive allows for high torque application without stripping. With 60,000 PSI tensile strength and Rockwell B69 hardness, these screws maintain integrity under vibration and dynamic loads, solving common failure points in industrial fastening systems.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit according to UNC standards with 1"-8 coarse thread spacing. Manufactured to ASME B18.2.1 specifications using ASTM A307 grade steel, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.
