S-91309A636 3/8"-16 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
- Enhanced corrosion resistance through zinc plating for extended service life in demanding environments
- Superior load-bearing capacity with 60,000 psi tensile strength for heavy-duty applications
- Optimized assembly efficiency with Class 2A thread fit ensuring smooth installation and reliable engagement
- Maximum grip strength through full threading along the entire 3" length for secure fastening
- Robust mechanical performance with Rockwell B69 hardness providing excellent durability
- Industry-standard compatibility with UNC coarse threads and external hex drive for universal tooling
- Regulatory compliance assurance meeting ASME B18.2.1 specifications and environmental standards
Professional Applications & Engineering Value
These 3/8"-16 UNC hex head screws deliver exceptional engineering value in industrial applications where vibration resistance and structural integrity are critical. The steel construction with zinc plating provides reliable corrosion protection, extending service life in manufacturing, machinery assembly, and construction environments. The coarse thread design ensures rapid installation and superior holding power in various materials, while the external hex drive allows for high-torque application with standard tools. Engineered to withstand substantial mechanical stress with 60,000 psi tensile strength, these fully threaded fasteners maintain consistent clamping force across the entire engagement length, preventing joint failure in heavy-duty applications.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread profile (3/8"-16 thread size) ensuring proper engagement and interchangeability. These inch system fasteners comply with ASME B18.2.1 manufacturing specifications and meet material requirements per ASTM A307. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they contain no restricted substances. The combination of dimensional precision and material certification guarantees reliable performance in regulated industrial applications.
