S-97763A264 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 with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
• Precise Class 3A thread fit provides secure, tight fastening with minimal risk of loosening.
• Hex drive design (5/32") allows for easy installation and removal with standard tools, reducing assembly time.
• Fully threaded UNC coarse spacing offers quick engagement and strong holding power in various materials.
• Rounded button head profile delivers a low-profile, aesthetically pleasing finish while minimizing snagging.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety.

Professional Applications & Engineering Value

This 1/4"-20 x 5/8" Black-Oxide 18-8 Stainless Steel Rounded Head Screw is engineered to address common industrial challenges such as corrosion, mechanical stress, and assembly efficiency. The Black-Oxide finish enhances durability and provides an additional layer of protection against oxidation, making it suitable for outdoor or humid conditions. With a Rockwell B55 hardness and 70,000 psi tensile strength, it withstands high-stress applications in machinery, automotive, and construction sectors. The hex drive and fully threaded UNC coarse spacing ensure quick, secure fastening, reducing downtime and improving productivity in repetitive assembly tasks.

Specification Summary & Compliance

This screw features precise Class 3A thread fit and UNC coarse thread spacing with right-hand threading for consistent performance. It meets ASME B18.3 manufacturing standards, ensuring dimensional accuracy and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations in global supply chains.