S-97763A355 1/4"-28 x 3/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and reducing replacement frequency.
• Superior holding power and reliability with fully threaded design and 70,000 psi tensile strength for demanding applications.
• Precise, vibration-resistant fastening ensured by Class 3A UNF fine threading for secure connections.
• Easy installation and removal with a 5/32" hex drive and rounded button head design, minimizing tool slippage.
• Consistent performance and durability backed by Rockwell B55 hardness, maintaining integrity under stress.
• Broad industrial compliance meeting ASME B18.3 standards, RoHS 3, and REACH for global supply chain compatibility.
• Optimized for fine thread applications with 1/4"-28 UNF sizing, providing excellent engagement in thin materials.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel Rounded Head Screw delivers critical engineering value by addressing common industrial challenges like corrosion, vibration loosening, and assembly efficiency. The Class 3A UNF fine threading offers tighter tolerances and superior resistance to loosening in high-vibration environments, such as machinery, automotive assemblies, and electronic enclosures. Its fully threaded design maximizes grip length, enhancing load distribution and pull-out strength in materials where thread engagement is limited. The black-oxide finish not only boosts corrosion resistance but also provides a sleek, non-reflective surface, making it suitable for aesthetic-sensitive applications. Combined with a 5/32" hex drive and rounded button head, it ensures quick, secure fastening with standard tools, reducing installation time and improving workflow in production lines. Ideal for industrial screws in OEM manufacturing, this fastener minimizes maintenance and downtime, offering long-term reliability.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for high-accuracy assemblies and UNF fine threading (1/4"-28) per industry norms. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer products without hazardous substances.