S-92451A595 5/16"-18 x 3" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass material, ideal for harsh environments and moisture-prone applications
• Exceptional tensile strength rated at 50,000 psi for reliable load-bearing performance in demanding assemblies
• Precision Class 2A thread fit ensures smooth installation and secure fastening with consistent engagement
• 82° countersink angle provides flush seating in standard countersunk holes for clean, professional finishes
• Rockwell B50 hardness offers excellent durability and resistance to wear during repeated use
• Slotted drive design allows for quick, tool-compatible installation with standard screwdrivers
• Partial threading optimizes grip strength while reducing material usage and weight

Professional Applications & Engineering Value

This 5/16"-18 UNC brass flat head slotted screw delivers critical performance in electrical enclosures, marine hardware, and plumbing systems where corrosion resistance is paramount. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening under vibration. With coarse thread spacing and Class 2A fit, it maintains reliable engagement in soft materials and blind holes. The 82° countersink angle ensures seamless flush mounting in paneling and machinery components, while brass construction eliminates galvanic corrosion when paired with dissimilar metals. These engineering features make it indispensable for maintenance-critical industrial applications requiring long-term reliability.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features UNC coarse threads with right-hand direction and 3" length with minimum 1-1/2" thread length. Standard flat head profile with slotted drive style for universal tool compatibility.