S-92949A539 1/4"-20 x 5/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• High-strength performance with a tensile strength of 70,000 psi and Rockwell B55 hardness, ensuring reliable, long-lasting fastening under load.
• Precise, secure threading with Class 3A UNC coarse threads for excellent grip and reduced risk of cross-threading during installation.
• Efficient installation and removal facilitated by the hex drive design, allowing for high torque application with standard tools.
• Optimized for durability with a fully threaded shank and rounded button head that distributes stress and resists stripping.
• Compliance and reliability guaranteed by meeting ASME B18.3 standards, ensuring dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, making it suitable for regulated industries.

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw is engineered to solve critical fastening challenges in demanding applications. Its corrosion-resistant properties and passivated finish make it ideal for machinery, marine equipment, and chemical processing plants where moisture and chemicals are prevalent. The 1/4"-20 UNC coarse thread and Class 3A thread fit provide superior holding power and vibration resistance, reducing maintenance needs in assembly lines and structural frameworks. The hex drive ensures quick, secure installation with common tools, enhancing workflow efficiency. By combining high tensile strength with regulatory compliance, this screw delivers reliable performance in industrial fastening scenarios, from heavy-duty equipment to precision instruments.

Specification Summary & Compliance

This screw features precise Class 3A thread fit and UNC coarse threading (1/4"-20) with a length of 5/8". It is manufactured in accordance with ASME B18.3 specifications for dimensional consistency. 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 suitable for global industrial use.