S-91309A623 3/8"-16 x 7/8" ASME B18.2.1, SAE J429 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
- Full threading design provides maximum grip and uniform stress distribution along the entire fastener length
- Class 2A thread fit offers excellent assembly compatibility while maintaining secure fastening
- External hex drive with 9/16" head width enables high-torque installation using standard tools
- Coarse UNC thread pattern allows for quick assembly and reduced cross-threading risks
- Rockwell B69 hardness rating delivers exceptional durability and resistance to deformation
Professional Applications & Engineering Value
This 3/8"-16 UNC hex head screw delivers exceptional engineering value through its Grade 2 steel construction and zinc plated finish, specifically engineered to combat corrosion in industrial settings. The coarse thread configuration provides superior performance in soft materials and applications requiring rapid assembly, while the external hex drive accommodates high torque requirements without stripping. The fully threaded design ensures maximum engagement in structural applications, machinery assembly, and heavy equipment where vibration resistance is critical. With its 60,000 psi tensile strength, this fastener maintains integrity under dynamic loads, making it ideal for construction, automotive, and manufacturing applications demanding reliable, long-term fastening solutions.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit tolerances and UNC coarse threading with 3/8"-16 specification. Manufactured to ASME B18.2.1 and SAE J429 Grade 2 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 hazardous substance restrictions and chemical safety.
