S-92451A581 5/16"-18 x 3/4" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to brass construction, ideal for harsh environments and moisture-prone applications
• Exceptional mechanical strength with 50,000 psi tensile strength and Rockwell B50 hardness for reliable load-bearing performance
• Flush, professional finish enabled by the 82° countersink angle and flat head design, preventing snagging and improving aesthetics
• Wide compatibility and easy installation with UNC coarse threads and Class 2A fit, ensuring quick assembly with standard tools
• Full-length threading provides maximum grip and holding power across the entire 3/4" length
• Slotted drive design allows for straightforward manual installation and removal with common screwdrivers
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, quality-controlled industrial use

Professional Applications & Engineering Value

These brass flat head slotted screws deliver critical performance in demanding industrial applications where corrosion resistance and reliable fastening are paramount. The UNC coarse thread and Class 2A fit ensure rapid, secure installation in wood, plastic, and soft metals, reducing assembly time while maintaining vibration resistance. The 82° countersink angle allows the screw to sit flush with surfaces, eliminating protrusions in machinery, electrical enclosures, and marine hardware. Manufactured from high-quality brass, these screws prevent galvanic corrosion when used with dissimilar metals, making them ideal for plumbing, HVAC systems, and outdoor fixtures. Their fully threaded design maximizes pull-out strength, providing engineers with a dependable fastener solution that combines durability with regulatory compliance.

Specification Summary & Compliance

This 5/16"-18 UNC screw features a Class 2A thread fit for consistent dimensional accuracy and easy assembly. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring mechanical reliability and interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.