S-91247A737 1/2"-13 x 6 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Optimized thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Enhanced durability from Rockwell C25 hardness, maintaining structural integrity under repeated stress
• Easy installation and removal with external hex drive design providing superior torque transmission
• Reduced material stress through partial threading design that concentrates strength where needed most
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver critical engineering solutions for heavy-duty industrial applications where failure is not an option. The zinc plated steel construction provides essential corrosion protection in manufacturing facilities, construction sites, and outdoor equipment. The 1/2"-13 UNC coarse thread configuration ensures rapid installation and superior holding power in structural steel connections, machinery assembly, and transportation equipment. With partial threading design, these fasteners eliminate unnecessary thread engagement points, concentrating the 120,000 psi tensile strength precisely where the clamping force is required. This engineering approach prevents thread stripping in soft materials while maintaining full strength in hardened steel applications, making them ideal for construction, industrial machinery, and equipment manufacturing where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC coarse thread specifications ensuring consistent performance across applications. These hex head screws comply with ASME B18.2.1 and SAE J429 Grade 5 standards for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial supply chains.