S-91309A632 3/8"-16 x 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
- Precise Class 2A thread fit for smooth installation and secure fastening in UNC coarse thread applications
- Full threading along the 2" length provides maximum grip and adjustment flexibility in assemblies
- External hex drive design allows for high-torque installation with standard tools, reducing assembly time
- Rockwell B69 hardness maintains thread integrity and prevents stripping during repeated use
- Compliance with major industry standards including ASME B18.2.1 and ASTM A307 for guaranteed quality and interoperability
Professional Applications & Engineering Value
These 3/8"-16 UNC hex head screws deliver exceptional engineering value in heavy-duty applications where vibration resistance and structural integrity are critical. The steel construction with zinc plating provides durable protection against corrosion in manufacturing, construction, and machinery assembly environments. The coarse UNC thread profile ensures rapid installation and superior holding power in soft materials and structural steel connections. With full threading along the 2" length, these fasteners distribute clamping force evenly, preventing joint loosening in dynamic load conditions. The external hex drive accommodates high torque values, making them ideal for maintenance operations and production lines where reliability and quick assembly are paramount.
Specification Summary & Compliance
This hex head screw features precision UNC 3/8"-16 coarse threads with Class 2A tolerance for consistent fit and performance. Manufactured to ASME B18.2.1 specifications and ASTM A307 material standards, ensuring dimensional accuracy and mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial supply chains.
