S-91236A658 3/8"-16 x 12" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 60,000 psi ensures reliable performance in heavy-duty applications, reducing the risk of fastener failure.
• Zinc plating provides superior corrosion resistance, extending the screw's service life in harsh industrial environments.
• Coarse UNC thread and Class 2A fit offer faster installation and reliable engagement in a wide range of materials.
• Partial threading design allows for precise clamping force control, ideal for applications requiring specific grip lengths.
• External hex drive and hex head facilitate easy installation and removal with common tools, improving assembly efficiency.
• Manufactured to ASME B18.2.1 and ASTM A307 standards guarantees consistent quality, dimensional accuracy, and interchangeability.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and suitability for global industrial supply chains.

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw is engineered to solve critical challenges in structural and heavy machinery applications. The steel construction, combined with a Rockwell B69 hardness, provides excellent durability and resistance to deformation under high stress. The coarse thread and Class 2A thread fit ensure quick, secure fastening in wood, metal, and composite materials, reducing assembly time and preventing cross-threading. The zinc plating offers a protective barrier against rust and corrosion, making it ideal for outdoor equipment, construction frameworks, and industrial machinery exposed to moisture. Its 12" length and partial threading allow for optimal load distribution, minimizing the risk of joint loosening in dynamic or vibrating environments, thereby enhancing the overall integrity and safety of the assembly.

Specification Summary & Compliance

This screw adheres to Class 2A thread tolerances for consistent fit and performance. It conforms to UNC (Unified Coarse) thread standards and is manufactured under ASME B18.2.1 and ASTM A307 specifications, ensuring dimensional precision and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industrial markets.