S-91247A526 1"-14 x 4" 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 industrial environments
• Precise thread engagement with Class 2A fit and extra fine 1"-14 thread pitch for secure fastening in critical assemblies
• Optimized torque transmission through external hex drive and 1 1/2" head width for efficient installation
• Enhanced durability with Rockwell C25 hardness Grade 5 steel construction resisting deformation under stress
• Versatile partial threading with 2 1/4" minimum thread length allowing flexibility in material thickness variations
• Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3 and REACH standards for quality and safety

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The extra fine 1"-14 thread configuration provides superior clamping force distribution, making it ideal for precision machinery, heavy equipment assemblies, and structural frameworks requiring minimal thread clearance. The zinc plated steel construction offers essential corrosion protection in manufacturing environments, while the partially threaded design ensures optimal grip length control. Engineered to ASME B18.2.1 specifications, this industrial fastener maintains consistent performance in high-stress applications, from construction equipment to industrial machinery, where 120,000 psi tensile strength prevents joint failure under dynamic loads.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNS thread form in inch system measurements. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for environmental safety. Features Grade 5 strength classification with verified Rockwell C25 hardness and 120,000 psi tensile strength for guaranteed performance in industrial applications.