S-91309A724 1/2"-13 x 3" 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 in heavy-duty applications
- Rockwell B69 hardness provides excellent durability and resistance to wear
- Class 2A thread fit offers optimal assembly ease while maintaining secure fastening
- External hex drive design enables quick installation and removal with standard tools
- Fully threaded construction maximizes grip length and load distribution
- UNC coarse thread pattern delivers superior resistance to vibration loosening
Professional Applications & Engineering Value
These 1/2"-13 UNC coarse thread hex head screws are engineered to address critical industrial fastening challenges where vibration resistance and structural integrity are paramount. The steel construction with zinc plating provides essential corrosion protection for outdoor equipment, machinery assemblies, and structural frameworks. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures these industrial screws maintain clamping force under dynamic loads, while the external hex drive facilitates efficient installation in confined spaces. Particularly valuable in construction, heavy machinery, and manufacturing applications, these fully threaded hex head bolts deliver consistent performance where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread specifications, these screws ensure consistent performance across industrial applications. Compliance with ASME B18.2.1 and ASTM A307 manufacturing standards guarantees dimensional accuracy and mechanical properties. Environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance ensures these components meet current environmental safety requirements for industrial use worldwide.
