S-97715A535 1/4"-28 x 1/2" Brass Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to brass construction, ideal for harsh environments and moisture-prone applications
• Exceptional thread precision and reliability with Class 3A fit, ensuring tight, secure connections and reducing assembly issues
• High mechanical strength offering 50,000 psi tensile strength and Rockwell B55 hardness for durable, long-lasting fastening under load
• Efficient installation and removal with a 5/32" hex drive, providing excellent torque transfer and reducing tool slippage
• Optimized for fine-thread applications using 1/4"-28 UNF threading for improved adjustment and vibration resistance in precision assemblies
• Fully threaded design for maximum grip and holding power along the entire 1/2" length, enhancing joint integrity
• Compliant with major environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This 1/4"-28 UNF brass rounded head screw is engineered to address critical challenges in precision mechanical and electrical assemblies. The fine thread spacing and Class 3A thread fit provide superior resistance to loosening under vibration, making it ideal for sensitive equipment, instrumentation, and automotive components. The brass material ensures excellent corrosion resistance, which is crucial in marine, plumbing, and outdoor applications where moisture exposure is common. With a rounded button head and hex drive, it offers a low-profile, aesthetically pleasing finish while allowing for high-torque installation without damaging the head. These features combine to deliver reliable performance in applications demanding both mechanical strength and environmental durability, reducing maintenance needs and improving product lifespan.

Specification Summary & Compliance

This screw adheres to UNF thread standards with a Class 3A thread fit for high precision. Key dimensional specifications include a 1/4"-28 thread size, 1/2" length, 0.437" head diameter, and 5/32" hex drive. It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, ensuring it meets strict environmental and safety standards for industrial use.