S-92210A172 1/4"-20 x 1 7/8" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
• Exceptional tensile strength of 70,000 psi ensures reliable, long-lasting fastening under high-stress conditions
• Precise Class 3A thread fit provides secure engagement and reduces the risk of cross-threading during installation
• Hex drive design allows for high-torque application and easy installation with standard tools
• 82° countersink angle enables flush mounting for a smooth, professional finish in assembled products
• Full threading along the entire 1-7/8" length offers maximum grip and adjustability in various material thicknesses
• Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 1/4-20 UNC flat head screws address critical fastening challenges with their robust 18-8 stainless steel construction and passivated finish. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures durability against vibration and mechanical stress, while the coarse thread spacing and Class 3A thread fit provide rapid assembly and secure hold in metals, plastics, and composites. The hex drive and 82° countersink facilitate efficient installation in confined spaces, making them ideal for machinery, automotive assemblies, and structural frameworks where corrosion resistance and reliability are paramount.

Specification Summary & Compliance

This flat head screw features precise UNC coarse threads with a Class 3A fit for tight tolerances, and is manufactured to ASME B18.3 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global supply chains.