S-91236A633 3/8"-16 x 2 1/4" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding environments
• High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and stress
• Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
• External hex drive design allows for easy installation and removal with standard tools
• Class 2A thread fit offers consistent, reliable engagement for secure fastening
• Coarse UNC threads enable quick assembly and reduced cross-threading risks
• Partial threading provides optimal grip and clamping force for varied material thicknesses

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw is engineered to address critical industrial fastening challenges. The steel construction with zinc plating delivers exceptional corrosion resistance, making it ideal for outdoor equipment, machinery assemblies, and structural applications where environmental exposure is a concern. The coarse thread design ensures rapid installation in wood, metal, and composite materials, while the partial threading provides superior clamping force distribution. With its external hex drive and standardized dimensions, this fastener simplifies maintenance and reduces assembly time in manufacturing, construction, and heavy equipment sectors where reliability and compliance with industry specifications are paramount.

Specification Summary & Compliance

This hex head screw features Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and consistent performance. Manufactured in compliance with ASME B18.2.1 specifications and ASTM A307 material standards, it meets rigorous engineering requirements. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use worldwide.