S-90276A130 5-40 x 5/8" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Superior load-bearing capacity with 60,000 psi tensile strength for reliable performance in high-stress applications
• Optimized thread engagement through Class 2A thread fit and UNC coarse threading, ensuring secure fastening and reduced cross-threading risks
• Enhanced durability with Rockwell B69 hardness, maintaining structural integrity under repeated use
• Full-threaded design providing maximum grip length and uniform stress distribution across the entire fastener
• Standard slotted drive compatibility with rounded head profile for easy installation using common tools
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and international environmental standards

Professional Applications & Engineering Value

These zinc-plated steel rounded head slotted screws deliver critical performance advantages for industrial assembly applications where vibration resistance and environmental durability are paramount. The UNC coarse thread configuration enables rapid installation in soft materials and castings, while the Class 2A thread fit provides optimal clearance for production efficiency without compromising joint security. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable fastening in machinery, electrical enclosures, and structural components subjected to dynamic loads. The fully threaded design maximizes engagement in varying material thicknesses, eliminating the need for multiple screw lengths in inventory. The zinc plating creates a sacrificial layer that significantly extends service life in moderately corrosive environments, making these 5-40 UNC screws ideal for outdoor equipment, automotive assemblies, and industrial maintenance applications.

Specification Summary & Compliance

This 5/8" length screw features precise Class 2A thread fit tolerances according to UNC thread standards with right-hand threading direction. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance requirements. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations regarding chemical safety, ensuring environmental responsibility in industrial supply chains.