S-90124A582 5/16"-18 x 7/8" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel coating, extending service life in harsh industrial environments.
• High tensile strength of 120,000 psi ensures reliable performance under heavy loads and vibrations.
• Rockwell C25 hardness provides excellent wear resistance and durability for repeated use.
• Fully threaded UNC coarse pattern allows for faster installation and secure holding in various materials.
• Class 2A thread fit guarantees precise, easy assembly without cross-threading issues.
• External hex drive design enables quick, firm tightening with standard tools, reducing installation time.
• Compliance with ASME B18.2.1 and SAE J429 standards ensures consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw is engineered to address critical challenges in industrial assembly, such as vibration loosening and environmental corrosion. The UNC coarse thread and fully threaded design provide superior grip in soft materials like wood and plastic, while the external hex drive allows for high-torque applications with common wrenches. Ideal for machinery, automotive, and construction sectors, it combines 120,000 psi tensile strength and Rockwell C25 hardness to withstand dynamic stresses, ensuring long-term reliability in heavy-duty fastening scenarios. The zinc plating further enhances resistance to moisture and chemicals, reducing maintenance needs.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread size with Class 2A thread fit for precise dimensional accuracy, adhering to ASME B18.2.1 and SAE J429 Grade 5 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.