S-91236A808 5/8"-11 x 3 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 tensile strength of 60,000 psi ensures reliable performance in demanding industrial applications, reducing the risk of fastener failure.
- Zinc plating finish provides excellent corrosion resistance, extending service life in harsh or outdoor environments.
- Coarse UNC thread with Class 2A fit allows for quick and easy installation, minimizing assembly time and labor costs.
- External hex drive and hex head design offers high torque capability and secure tightening with standard tools, preventing stripping.
- Partially threaded shank enables precise clamping force control, ideal for applications where vibration resistance is critical.
- Compliance with ASME B18.2.1 and ASTM A307 guarantees consistent quality, dimensional accuracy, and interchangeability.
- Rockwell B69 hardness provides excellent durability and wear resistance, maintaining integrity under repeated stress.
Professional Applications & Engineering Value
This 5/8"-11 UNC hex head screw is engineered to address common industrial fastening challenges, such as structural loosening due to vibration and environmental corrosion. Constructed from high-grade steel and finished with zinc plating, it offers robust protection against rust and degradation, making it suitable for construction, machinery assembly, and heavy equipment applications. The coarse thread design ensures rapid installation and reliable grip in various materials, while the external hex drive allows for high-torque application without slippage. By meeting ASME B18.2.1 and ASTM A307 specifications, this screw delivers consistent performance, reducing maintenance needs and enhancing operational safety in industrial settings.
Specification Summary & Compliance
This hex head screw features a 5/8"-11 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It complies with ASME B18.2.1 and ASTM A307 manufacturing specifications, ensuring dimensional accuracy and mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.
