S-91236A936 1"-8 x 12" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in demanding environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and prevents fastener failure
• Rockwell B69 hardness provides excellent durability and resistance to wear in industrial applications
• Class 2A thread fit offers consistent, reliable assembly with standard nuts and tapped holes
• External hex drive design allows for easy installation and high torque application with common tools
• Partial threading provides optimal grip strength while reducing weight and material usage
• Compliance with major standards including ASME B18.2.1 ensures quality and interchangeability

Professional Applications & Engineering Value

This heavy-duty hex head screw delivers exceptional engineering value through its steel construction and zinc plating, specifically designed to address common industrial challenges. The 1"-8 UNC coarse thread configuration provides superior holding power in structural applications, while the partial threading optimizes clamping force distribution. The external hex drive enables high-torque installation in confined spaces, making it ideal for construction, machinery assembly, and heavy equipment applications where vibration resistance and long-term reliability are critical. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures these fasteners maintain integrity under sustained mechanical stress.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit per UNC standards with 1"-8 coarse thread spacing and right-hand threading. Manufactured to ASME B18.2.1 specifications using ASTM A307 material standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors.