S-91236A723 1/2"-13 x 2 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 harsh industrial environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Class 2A thread fit provides consistent engagement and reduces cross-threading risks during installation
- Partially threaded shank design allows for precise clamping force and secure joint integrity
- External hex drive with 3/4" head width enables high-torque installation using standard tools
- Coarse UNC thread pattern facilitates quick assembly and disassembly in various materials
- Rockwell B69 hardness rating maintains thread integrity and prevents stripping under repeated use
Professional Applications & Engineering Value
This 1/2"-13 UNC hex head screw delivers exceptional engineering value for industrial fastening applications requiring robust, long-lasting connections. The combination of steel construction and zinc plating addresses common corrosion challenges in manufacturing facilities, construction sites, and machinery assembly. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening in high-vibration environments. With coarse UNC threading, these external hex drive fasteners install quickly in steel frames, structural supports, and heavy equipment, reducing assembly time while maintaining 60,000 psi tensile strength for critical load-bearing applications. The standardized inch system dimensions ensure compatibility with existing tooling and equipment across North American industrial operations.
Specification Summary & Compliance
This hex head screw maintains Class 2A thread fit per UNC standards with 1/2"-13 coarse thread specification and 2-3/4" length. Manufactured in compliance with ASME B18.2.1 dimensional requirements and ASTM A307 material specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for industrial use.
