S-91247A679 7/16"-14 x 2 1/2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced load-bearing capacity with Grade 5 steel construction providing 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating that extends service life in harsh industrial environments
• Optimized thread engagement with coarse UNC threading ensuring quick assembly and secure fastening in various materials
• Precise thread compatibility through Class 2A thread fit that guarantees consistent mating with standard nuts and components
• Excellent torque transmission via the external hex drive design that prevents tool slippage during installation
• Reduced material stress with Rockwell C25 hardness balancing strength with appropriate ductility for vibration resistance
• Versatile partial threading allowing unthreaded shank sections to function as precision dowels or pivots in assemblies

Professional Applications & Engineering Value

This 7/16"-14 UNC Grade 5 steel hex head screw delivers exceptional engineering value across industrial sectors. The zinc plated finish provides critical corrosion protection for outdoor equipment, agricultural machinery, and structural frameworks exposed to environmental elements. The coarse UNC threading ensures rapid installation in steel frameworks, construction assemblies, and heavy equipment where vibration resistance is paramount. With partial threading and 2 1/2" length, this fastener offers precise positioning in machinery mounts while the unthreaded section maintains alignment integrity. The external hex drive accommodates standard wrenches for high-torque applications in confined spaces, making it ideal for maintenance operations and production line assemblies where reliability cannot be compromised.

Specification Summary & Compliance

This hex head screw maintains precise Class 2A thread fit tolerances per UNC standards, ensuring consistent mating with compatible components. Manufacturing complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety, making it suitable for global industrial supply chains and environmentally conscious manufacturing operations.