S-90283A124 5-40 x 1/4" ASME B18.6.3 Steel Pan 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 mechanical strength with 60,000 psi tensile strength and Rockwell B60 hardness for reliable, heavy-duty fastening applications
• Precision threading compatibility featuring Class 2A UNC coarse threads for easy installation and secure fit in various materials
• Optimized drive efficiency with standard slotted drive design for straightforward installation using common tools
• Enhanced surface contact through rounded pan head profile for improved load distribution and reduced surface damage
• Full-thread engagement along the entire 1/4" length for maximum holding power and vibration resistance
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These 5-40 UNC zinc-plated steel rounded head screws deliver critical performance advantages for industrial assembly operations. The zinc-plated steel construction provides essential corrosion protection in manufacturing environments where moisture and chemicals are present, while the Rockwell B60 hardness and 60,000 psi tensile strength ensure reliable performance under mechanical stress. The Class 2A thread fit with coarse UNC threading enables quick installation and secure fastening in various materials without stripping. The slotted drive style offers compatibility with standard tools, making these fully threaded screws ideal for production lines requiring efficient, high-volume assembly. The rounded pan head design distributes clamping force effectively, preventing damage to sensitive surfaces while maintaining secure connections in machinery, equipment, and structural applications.

Specification Summary & Compliance

These rounded head screws feature precision 5-40 UNC coarse threads with Class 2A thread fit tolerance for consistent performance. Manufacturing adheres to ASME B18.6.3 specifications for dimensional accuracy and quality assurance. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. All dimensions follow the inch system with standardized 1/4" length and right-hand threading for universal compatibility.