S-91236A649 3/8"-16 x 6 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
- High tensile strength of 60,000 psi ensures reliable performance in demanding industrial applications
- Zinc plating finish provides superior corrosion resistance for extended service life in harsh environments
- Class 2A thread fit with UNC coarse threading enables quick installation and secure fastening
- Partially threaded design allows for precise clamping force control and vibration resistance
- External hex drive with 9/16" head width offers excellent torque transmission and tool accessibility
- Rockwell B69 hardness maintains structural integrity under heavy loads and repeated use
- Full compliance with ASME B18.2.1, ASTM A307, RoHS 3, and REACH ensures quality and environmental safety
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw delivers exceptional engineering value through its steel construction and zinc plated finish, specifically designed to address common industrial fastening challenges. The coarse thread configuration provides superior grip in soft materials and prevents cross-threading during assembly, while the partial threading allows for optimal stress distribution across joined components. Ideal for structural applications, machinery assembly, and heavy equipment maintenance, this external hex drive screw ensures reliable performance in vibration-prone environments. The combination of 60,000 psi tensile strength and Rockwell B69 hardness makes it suitable for load-bearing applications where fastener integrity is critical to operational safety and equipment longevity.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with UNC coarse threads (3/8"-16) and measures 6 1/2" in total length with a minimum thread length of 1 1/4". Manufactured to ASME B18.2.1 specifications and ASTM A307 standards, it ensures dimensional accuracy and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry requirements for safe and sustainable industrial components.
