S-97715A303 5/16"-18 x 1/2" ASME B18.3 Brass Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from brass construction, ideal for harsh industrial environments and moisture-prone applications
• Exceptional tensile strength (50,000 psi) ensures reliable, long-term fastening under high-stress conditions
• Precision Class 3A thread fit guarantees tight, secure connections with minimal risk of loosening
• Efficient hex drive (3/16") provides superior torque transmission and easy installation with standard tools
• Fully threaded design offers maximum grip and holding power across the entire 1/2" length
• Compliance with ASME B18.3 standards ensures consistent quality, dimensional accuracy, and interchangeability
• RoHS 3 and REACH compliant for safe use in regulated industries and environmentally sensitive applications

Professional Applications & Engineering Value

This 5/16"-18 UNC brass rounded head screw delivers critical performance in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The brass material inherently resists oxidation and galvanic corrosion, making it ideal for electrical components, marine equipment, and plumbing systems. Its hex drive design ensures maximum torque application without cam-out, while the Class 3A thread fit provides vibration resistance in machinery and assembly lines. With 50,000 psi tensile strength and Rockwell B55 hardness, it maintains integrity under dynamic loads, solving common failure points in coarse thread applications where durability is non-negotiable.

Specification Summary & Compliance

This screw features UNC coarse threading with Class 3A precision tolerance for secure fitment. Manufacturing adheres to ASME B18.3 specifications for dimensional consistency. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.