S-91309A796 5/8"-11 x 1 1/4" 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 for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 2A thread fit provides smooth assembly and consistent clamping force
- External hex drive design allows for high-torque installation with standard tools
- Coarse UNC thread pattern enables quick installation and superior resistance to loosening
- Full threading along the entire 1-1/4" length offers maximum adjustment flexibility
- Rockwell B69 hardness rating maintains thread integrity and prevents stripping during installation
Professional Applications & Engineering Value
These 5/8"-11 UNC hex head screws deliver exceptional engineering value for industrial applications where vibration resistance and structural integrity are critical. The steel construction with zinc plating provides durable protection against corrosion in manufacturing facilities, construction sites, and machinery assembly. The coarse thread design significantly reduces cross-threading risks during high-volume assembly operations, while the external hex drive accommodates standard wrenches for efficient installation in confined spaces. With full threading along the entire shank, these fasteners offer superior grip range for structural connections, equipment mounting, and heavy-duty framework where precise adjustment is essential for long-term reliability.
Specification Summary & Compliance
Manufactured to exact inch system dimensions with Class 2A thread fit tolerance ensuring consistent performance. Complies with ASME B18.2.1 dimensional standards and ASTM A307 material specifications for carbon steel bolts. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. Features UNC coarse threads with right-hand direction and external hex drive configuration for standardized installation procedures.
