S-91236A646 3/8"-16 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
- Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
- External hex drive design allows for easy installation and high torque application with standard tools
- Class 2A thread fit ensures smooth assembly and consistent performance with standard nuts
- Partial threading offers optimal grip and clamping force for specific joint requirements
- Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees quality, safety, and environmental standards
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw is engineered to address critical challenges in industrial assembly and construction. The steel construction with zinc plating provides robust protection against rust and corrosion, making it ideal for outdoor equipment, machinery frames, and structural applications exposed to harsh conditions. The coarse UNC thread and external hex drive facilitate quick installation and secure fastening in high-vibration environments, reducing maintenance downtime. With a 5 1/2" length and partial threading, it delivers precise clamping control for heavy-duty connections, ensuring long-term reliability in manufacturing, automotive, and infrastructure projects where 60,000 psi tensile strength is essential for load-bearing integrity.
Specification Summary & Compliance
This screw features a 3/8"-16 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy and compatibility. It is manufactured in accordance with ASME B18.2.1 specifications and complies with ASTM A307 for material standards. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial use.
