S-91236A738 1/2"-13 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 for extended service life in demanding environments
- High-strength steel construction providing 60,000 psi tensile strength for reliable heavy-duty fastening
- Rockwell B69 hardness ensuring excellent durability and resistance to deformation under load
- External hex drive design allowing for easy installation and high torque application with standard tools
- Class 2A thread fit offering optimal assembly clearance while maintaining secure connections
- Partially threaded shank providing unthreaded grip length for precise clamping in structural applications
- Industry standard compliance meeting ASME B18.2.1 specifications for guaranteed interchangeability
Professional Applications & Engineering Value
This 1/2"-13 UNC hex head screw delivers exceptional engineering value through its steel construction and zinc plating, specifically designed to address common industrial fastening challenges. The coarse thread configuration ensures rapid installation and superior resistance to vibration loosening in heavy machinery, structural steel connections, and equipment assembly. The partially threaded design provides an unthreaded bearing surface that prevents joint rotation and distributes clamping force evenly, making it ideal for applications requiring precise grip length. With its external hex drive and right-hand thread, this fastener offers compatibility with standard tools and straightforward installation procedures, reducing assembly time while maintaining the integrity of critical connections in construction, manufacturing, and maintenance operations.
Specification Summary & Compliance
This heavy-duty hex head screw features Class 2A thread fit per UNC standards, ensuring proper assembly clearance and interchangeability. Manufactured to ASME B18.2.1 specifications where identified with ASTM A307, it guarantees dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, meeting environmental and safety standards for industrial use worldwide.
