S-90276A139 5-40 x 2" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in harsh industrial environments
• Exceptional tensile strength rated at 60,000 psi for reliable load-bearing capacity in demanding applications
• Precision Class 2A thread fit guarantees smooth installation and secure fastening with consistent engagement
• Full threading design provides maximum grip length and uniform stress distribution across the entire fastener
• Rockwell B69 hardness delivers excellent durability and resistance to deformation under pressure
• Standard slotted drive offers compatibility with common tools while the rounded head profile prevents snagging
• Coarse UNC thread spacing enables quick assembly and reduced cross-threading risks in production environments

Professional Applications & Engineering Value

Engineered for industrial reliability, these 5-40 UNC rounded head screws solve critical fastening challenges in manufacturing and assembly operations. The zinc-plated steel construction provides essential corrosion protection for equipment exposed to moisture or chemical environments, while the 60,000 psi tensile strength ensures structural integrity in high-stress applications. The combination of coarse thread spacing and Class 2A thread fit delivers rapid installation with minimal risk of cross-threading, significantly reducing assembly time and improving production efficiency. These fully threaded screws are particularly valuable in electrical enclosures, machinery frames, and automotive components where vibration resistance and long-term reliability are paramount. The rounded head profile with slotted drive offers both safety and accessibility, making them ideal for maintenance and repair scenarios across multiple industrial sectors.

Specification Summary & Compliance

This 2-inch rounded head screw features precise 5-40 UNC coarse threads with Class 2A fit tolerance per ASME standards, ensuring consistent threading performance. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) regulations for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety, meeting the latest industry standards for environmental responsibility and workplace safety.