S-90124A804 5/8"-11 x 2 1/2" 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 construction, extending service life in demanding industrial environments
• Exceptional load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for reliable heavy-duty applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit, ensuring secure fastening and vibration resistance
• Enhanced installation efficiency with external hex drive design and 15/16" head width for easy tool access and torque application
• Controlled thread distribution with partial threading design, providing optimal grip strength where needed most
• Wire locking capability for added security in high-vibration applications, preventing unintentional loosening
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical performance in heavy machinery, structural steel connections, and industrial equipment assembly where high tensile strength and vibration resistance are paramount. The zinc-plated steel construction provides essential corrosion protection for outdoor or harsh environment applications, while the 5/8"-11 UNC coarse threading ensures rapid installation and superior holding power in structural components. The partial threading design concentrates strength where clamping force is most critical, and the external hex drive accommodates standard industrial tools for efficient maintenance and assembly operations. Engineered to ASME B18.2.1 specifications, this fastener maintains dimensional consistency for reliable interchangeability across industrial systems.

Specification Summary & Compliance

This 2 1/2" length hex head screw features 5/8"-11 UNC coarse threads with Class 2A thread fit for precise dimensional tolerance. Manufactured to Grade 5 standards (SAE J429) with Rockwell C25 hardness and 120,000 psi tensile strength. Compliant with ASME B18.2.1 dimensional specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical safety regulations for industrial use.