S-98511A161 4-40 x 1" Aluminum Socket Head Screws

Key Features & Benefits at a Glance

• Superior strength-to-weight ratio from 7075 aluminum construction, ideal for applications where weight reduction is critical without sacrificing durability
• Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening in high-vibration environments
• Standard UNC coarse threads provide faster assembly and reduced cross-threading risk compared to fine-thread alternatives
• 3/32" hex drive design delivers reliable torque transmission and prevents tool slippage during installation
• Fully threaded shank offers maximum grip length and uniform load distribution across the entire fastener
• RoHS 3 and REACH compliance guarantees environmental safety and regulatory acceptance for global industrial applications
• Standard socket head profile enables flush mounting in countersunk holes while providing ample drive engagement

Professional Applications & Engineering Value

Engineered for demanding applications where precision and reliability are paramount, these 7075 aluminum socket head cap screws deliver exceptional performance in aerospace components, robotics assemblies, and precision instrumentation. The 4-40 UNC coarse thread configuration with Class 3A fit provides superior engagement in tapped holes, reducing the risk of stripping in soft materials while maintaining consistent clamping force. The combination of right-hand threading and fully threaded design ensures maximum thread contact area, distributing stress evenly across the fastener for enhanced fatigue resistance. With their hex drive compatibility and standardized head profile, these fasteners enable efficient installation in confined spaces while meeting stringent industry requirements for precision components.

Specification Summary & Compliance

This socket head cap screw features precision 4-40 UNC coarse threads manufactured to Class 3A fit tolerances for superior thread engagement. The fastener maintains dimensional accuracy with a head diameter of 0.183" and standard socket head profile. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for industrial applications requiring compliance with international standards.