S-98164A238 1/4"-20 x 2 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction and passivated finish
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance
• Precise, secure fastening ensured by the Class 3A thread fit and UNC coarse thread pattern, reducing the risk of cross-threading
• Efficient installation and removal with the 5/32" hex drive, providing a positive grip and reducing tool slippage
• Full-length threading offers consistent engagement along the entire 2 1/2" length for versatile and robust connections
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence
• Rounded button head design provides a low-profile, finished appearance while minimizing snagging in application

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 316 stainless steel rounded head screw excels in applications where chemical resistance and durability are paramount. The passivated finish enhances its ability to withstand corrosive agents, making it ideal for chemical processing, marine, and food industry equipment. Its 1/4"-20 UNC coarse thread and Class 3A fit deliver reliable performance in high-vibration environments, preventing loosening over time. The fully threaded design and hex drive facilitate quick assembly and disassembly, reducing downtime in maintenance-heavy operations. By meeting ASME B18.3 specifications, it ensures consistent quality and interchangeability, supporting efficient B2B procurement and project timelines.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and the UNC coarse thread pattern. It is manufactured in compliance with ASME B18.3 and meets environmental regulations such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances. The 2 1/2" length and fully threaded design are consistent with industrial requirements for robust fastening solutions.