S-91236A816 5/8"-11 x 5 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, extending service life in demanding industrial environments.
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration.
- Coarse UNC thread and Class 2A fit provide faster assembly and secure fastening in a wide range of materials.
- External hex drive and hex head design allow for high-torque installation with common tools, speeding up maintenance and assembly.
- Partially threaded shank concentrates clamping force for a more secure joint, reducing the risk of loosening.
- Compliance with ASME B18.2.1 and ASTM A307 guarantees consistent quality, dimensional accuracy, and interchangeability.
- Rockwell B69 hardness offers excellent durability and resistance to wear and deformation.
Professional Applications & Engineering Value
This 5/8"-11 UNC hex head screw is engineered for heavy-duty industrial applications where reliability is non-negotiable. The high-strength steel construction, combined with a zinc-plated finish, provides robust defense against corrosion, making it ideal for outdoor machinery, structural steel connections, and assembly lines exposed to harsh conditions. The coarse thread design ensures quick engagement and superior holding power in wood, metal, and composite materials, reducing installation time. Its partially threaded configuration focuses clamping force directly under the hex head, preventing joint failure in high-vibration environments like construction equipment and transportation infrastructure. This screw delivers predictable, long-term performance, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This product adheres to Class 2A thread fit tolerances for consistent assembly. It conforms to the ASME B18.2.1 standard and is manufactured from ASTM A307 grade steel. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global supply chain integration.
