S-92865A452 5/8"-18 x 6" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc plating protects against rust and environmental damage, extending service life in harsh industrial conditions.
• Precise Class 2A thread fit with UNF fine threading provides secure, vibration-resistant connections, minimizing loosening over time.
• High hardness rating (Rockwell C25) offers excellent wear resistance, maintaining structural integrity under repeated loads.
• Full threading along the 6" length allows for adjustable engagement depth, accommodating various material thicknesses with a single fastener.
• External hex drive design enables easy installation and high torque application using standard tools, speeding up assembly processes.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability, ensuring compatibility with existing industrial systems.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address critical fastening challenges in heavy-duty environments. Its zinc plated steel construction combats corrosion in outdoor or humid settings, while the UNF fine thread and Class 2A fit deliver tight, secure joints that resist vibration-induced loosening—common in machinery, structural frames, and automotive assemblies. The external hex drive facilitates quick installation with high torque capability, reducing assembly time without compromising clamp load. Ideal for construction, manufacturing, and equipment repair, this fully threaded fastener provides uniform stress distribution, enhancing joint reliability where dynamic loads are present.

Specification Summary & Compliance

This fastener adheres to Class 2A thread tolerance per UNF standards, ensuring precise fit and interchangeability. It meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties, including tensile strength and hardness. The product is fully RoHS 3 (2015/863/EU) compliant, confirming it is free of restricted hazardous substances, making it suitable for regulated industrial and international markets.