S-92210A118 4-40 x 1 1/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and Passivated finish for long-lasting performance in harsh environments.
• High tensile strength of 70,000 psi ensures reliable fastening under significant mechanical stress.
• Precision Class 3A thread fit provides secure, vibration-resistant connections for critical assemblies.
• 82° countersink angle and flat head design allows for a flush, unobtrusive finish in countersunk holes.
• Hex drive (1/16") offers easy installation and high torque application without cam-out.
• Full threading along the 1-1/4" length maximizes grip and adjustability in various material thicknesses.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards.

Professional Applications & Engineering Value

These 4-40 UNC Flat Head Screws are engineered to address common industrial challenges such as component loosening due to vibration and corrosion in demanding environments. The 18-8 Stainless Steel material, combined with a Passivated finish, provides excellent resistance to oxidation and chemical exposure, making them ideal for industrial applications in machinery, electronics, and outdoor equipment. The coarse thread spacing and Class 3A thread fit ensure quick assembly and a tight, reliable hold, reducing maintenance needs and downtime. With a Rockwell B55 hardness and fully threaded design, they offer consistent performance in high-stress scenarios, supporting efficient production and long-term durability.

Specification Summary & Compliance

This screw features precise dimensions including a Thread Fit of Class 3A and adheres to UNC thread standards with a size of 4-40. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and quality assurance for industrial use.