S-97763A102 4-40 x 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments.
• Exceptional thread reliability with Class 3A fit, ensuring precise, secure fastening and vibration resistance.
• High tensile strength of 70,000 psi provides dependable load-bearing capacity for demanding applications.
• Rockwell B55 hardness offers excellent durability and resistance to wear and deformation.
• 1/16" hex drive design allows for easy installation and removal with standard tools, reducing assembly time.
• Fully threaded 4-40 UNC coarse spacing enables maximum grip and holding power in various materials.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met.

Professional Applications & Engineering Value

This 4-40 UNC thread rounded head screw is engineered to address common industrial challenges, such as corrosion and mechanical stress. Made from Black-Oxide 18-8 Stainless Steel, it provides long-lasting protection against rust and chemical exposure, making it suitable for outdoor equipment, machinery, and electronics. The Class 3A thread fit and coarse spacing ensure tight, reliable connections that resist loosening under vibration, while the button head style and hex drive facilitate quick, tool-friendly installation. Ideal for assembly lines and maintenance, these screws enhance efficiency and reduce downtime in industrial fastening applications where precision and durability are critical.

Specification Summary & Compliance

This screw features precise Class 3A thread fit with UNC coarse spacing, adhering to ASME B18.3 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.