S-98511A221 4-40 x 5/16" Aluminum Socket Head Screws

Key Features & Benefits at a Glance

• Superior strength-to-weight ratio with 7075 aluminum construction, ideal for applications requiring lightweight yet durable fastening solutions.
• Precise Class 3A thread fit ensures tight tolerances and reliable engagement in demanding assemblies, reducing the risk of loosening.
• 3/32" hex drive design allows for easy installation and removal with standard tools, minimizing assembly time and effort.
• Fully threaded rod type provides consistent holding power along the entire 5/16" length, enhancing load distribution and stability.
• 4-40 UNC coarse threads offer quick assembly and resistance to vibration, suitable for high-stress industrial environments.
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence, supporting sustainable manufacturing practices.
• Right-hand thread direction with standard socket head profile ensures compatibility with common fastening systems and reduces installation errors.

Professional Applications & Engineering Value

This 7075 aluminum socket head cap screw is engineered to address critical challenges in precision industries, such as aerospace, electronics, and machinery, where weight reduction and corrosion resistance are paramount. The 4-40 UNC coarse thread and Class 3A fit deliver exceptional thread engagement, minimizing backlash and enhancing joint integrity under dynamic loads. Its fully threaded design ensures uniform stress distribution, preventing fatigue failures in high-vibration settings. With a 3/32" hex drive, installation is streamlined for tight spaces, reducing labor costs and improving assembly efficiency. Ideal for applications demanding lightweight durability and regulatory compliance, this screw offers reliable performance in environments where material integrity and precision are non-negotiable.

Specification Summary & Compliance

This product features a 4-40 UNC thread size with Class 3A thread fit for high precision, adhering to standard inch measurements. The coarse thread spacing and right-hand thread direction ensure compatibility with common industrial systems. Manufactured from 7075 aluminum, it meets rigorous standards for durability without specified hardness ratings. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming environmental safety and regulatory alignment for global supply chains.