S-92451A126 5-40 x 3/8" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass material, ensuring long-term reliability in harsh environments
• Precise flush mounting capability with standard 82° countersink angle for seamless surface integration
• Exceptional mechanical strength with 50,000 psi tensile strength and Rockwell B50 hardness for demanding applications
• Reliable thread engagement through Class 2A thread fit and UNC coarse threading for secure fastening
• Full-length threading provides maximum grip and load distribution across the entire fastener length
• Industry-standard compliance with ASME B18.6.3 specifications for consistent quality and performance
• Environmental responsibility through RoHS 3 and REACH compliance for safe industrial use

Professional Applications & Engineering Value

This 5-40 UNC flat head slotted brass screw delivers exceptional engineering value across multiple industrial sectors. The combination of brass material and Rockwell B50 hardness provides optimal corrosion resistance while maintaining excellent machinability, making it ideal for electrical components, marine equipment, and plumbing systems where moisture resistance is critical. The standard 82° countersink angle ensures perfect flush mounting in precision assemblies, eliminating protrusions that could interfere with mechanical operations. With fully threaded design and Class 2A thread fit, these screws offer superior holding power in soft materials and thin sheets, while the coarse UNC threading prevents cross-threading during installation. These features collectively address common industrial challenges including galvanic corrosion, vibration loosening, and installation efficiency in high-volume production environments.

Specification Summary & Compliance

This flat head slotted screw maintains precise dimensional accuracy with Class 2A thread fit per UNC standards and inch system measurements. Manufacturing complies with ASME B18.6.3 specifications for dimensional consistency and performance reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substance restrictions. Thread specifications include 5-40 UNC coarse spacing with right-hand thread direction, ensuring compatibility with standard industrial components and tooling systems.