S-97715A263 1/4"-20 x 1/2" ASME B18.3 Brass Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance due to brass construction, ideal for harsh environments and moisture-prone applications.
• Enhanced installation security with a 5/32" hex drive, preventing cam-out and ensuring a reliable, tight fit.
• High load-bearing capacity from a 50,000 psi tensile strength and Rockwell B55 hardness for durable, long-lasting assemblies.
• Precise, reliable threading with a Class 3A fit and UNC coarse thread profile, enabling faster assembly and reduced cross-threading risk.
• Versatile rounded button head design provides a low-profile, finished appearance while minimizing snagging.
• Full threading along the 1/2" length ensures maximum grip and holding power across the entire fastener.
• Compliance with major industry standards including ASME B18.3, guaranteeing consistent quality and performance.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 1/4"-20 UNC brass rounded head screws address common challenges like galvanic corrosion and assembly inefficiency. The brass material inherently resists rust and is non-sparking, making it a safe choice for electrical components, marine hardware, and plumbing systems. The combination of a coarse thread and Class 3A fit allows for rapid installation in softer materials or pre-tapped holes, reducing labor time without sacrificing joint integrity. The hex drive and button head profile are designed for applications where a flush or low-profile finish is desired without compromising on the torque application. This makes them an excellent fastener for machinery panels, decorative fixtures, and equipment where both aesthetics and corrosion resistance are critical.

Specification Summary & Compliance

This screw meets precise dimensional standards with a Class 3A thread fit for superior interchangeability and a UNC 1/4"-20 coarse thread. Manufacturing and quality are governed by the ASME B18.3 specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various markets.