S-90117A804 5/8"-11 x 2 1/2" ASME B18.3 Alloy Steel Wire-Lockable Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life and maintaining integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening in dynamic operations.
• Heavy-duty hex drive design with 1/2" drive size allows for high-torque installation and easy access in confined spaces, improving assembly efficiency.
• Partially threaded shank offers optimal grip and alignment, preventing joint slippage and ensuring consistent clamping force.
• Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability, streamlining procurement and replacement processes.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, supporting sustainable and responsible manufacturing practices.

Professional Applications & Engineering Value

This 5/8"-11 UNC Socket Head Cap Screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors where vibration resistance and high load capacity are paramount. The black-oxide alloy steel construction combats rust and wear, while the coarse thread spacing and Class 3A thread fit enhance grip in softer materials or high-vibration environments, reducing maintenance downtime. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme forces without deformation, making it ideal for bolted connections in frames, engines, and structural assemblies. The hex drive and standard socket head profile facilitate quick installation with common tools, improving workflow efficiency in industrial settings.

Specification Summary & Compliance

This screw features a 5/8"-11 UNC coarse thread with Class 3A fit for precise engagement, a length of 2 1/2", and a minimum thread length of 1 3/4". It conforms to ASME B18.3 specifications for dimensional consistency and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring adherence to environmental and safety regulations.