S-91309A714 1/2"-13 x 1 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 harsh industrial environments
• High tensile strength of 60,000 PSI ensures reliable performance under heavy loads and vibration
• Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
• Class 2A thread fit with UNC coarse threading offers faster assembly and reduced cross-threading risks
• External hex drive design allows for high-torque installation with standard tools
• Full threading along the 1-1/4" length enables maximum grip and adjustability in various material thicknesses
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees quality and environmental safety for global supply chains

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered to address critical challenges in industrial fastening, where vibration resistance, load capacity, and corrosion protection are paramount. The steel construction with zinc plating combats rust in demanding environments like outdoor machinery, structural assemblies, and manufacturing equipment. Its coarse UNC threads provide superior holding power in softer materials and faster installation, reducing labor time. With full threading and external hex drive, it ensures secure fastening in high-stress applications, from construction to automotive sectors, delivering consistent performance and reducing maintenance needs.

Specification Summary & Compliance

This screw features precise Class 2A thread fit per UNC standards, ensuring compatibility and ease of assembly. It complies with ASME B18.2.1 manufacturing specifications, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety, making it suitable for regulated industrial and international markets.