S-97715A634 1/2"-20 x 1" Brass Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance due to brass construction, ideal for harsh industrial environments and outdoor applications
• High-strength performance with a 50,000 psi tensile strength and Rockwell B55 hardness for reliable, durable fastening
• Precise, secure thread engagement with a Class 3A fine UNF thread fit, minimizing the risk of loosening under vibration
• Efficient installation and removal with a 5/16" hex drive, providing excellent torque transfer and reducing tool slippage
• Versatile, low-profile design featuring a rounded button head that sits flush and reduces snagging in assembled components
• Full threading for maximum grip along the entire 1" length, ensuring consistent clamping force across the joint
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for regulated industries

Professional Applications & Engineering Value

This 1/2"-20 UNF brass rounded head screw is engineered to solve critical challenges in precision assembly and corrosive environments. The brass material inherently resists rust and galvanic corrosion, making it perfect for marine, electrical, and plumbing systems where moisture is a concern. The Class 3A fine thread provides a tighter tolerance fit compared to standard threads, which is essential for applications subject to vibration, such as machinery, automotive components, and electronic enclosures. The combination of the hex drive and rounded button head allows for high-torque installation in confined spaces while maintaining a smooth, finished appearance. With a 50,000 psi tensile strength, it delivers the robust performance needed for high-stress industrial fastening without compromising on regulatory compliance.

Specification Summary & Compliance

This screw conforms to the Unified National Fine (UNF) thread standard with a Class 3A thread fit, ensuring high precision and interchangeability. Manufactured in the inch system with a thread size of 1/2"-20, a length of 1", and a 5/16" hex drive. It is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloy and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for industrial use.