S-96640A251 1/4"-20 x 3 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and reducing maintenance costs.
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration.
• Rockwell B80 hardness provides excellent durability and resistance to wear over time.
• Fully threaded UNC coarse spacing delivers superior grip and faster installation in various materials.
• Standard 82° countersink angle allows for a flush, secure fit in pre-drilled holes.
• Class 2A thread fit offers consistent, reliable engagement with standard nuts and tapped holes.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality, safety, and environmental standards are met.

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel flat head screws are engineered to address common industrial challenges, such as corrosion in outdoor or chemical-exposed settings. The fully threaded UNC coarse spacing enhances holding power in wood, metal, and plastic assemblies, reducing the risk of loosening under stress. With a Phillips drive (No. 3 size) and standard 82° countersink, they enable quick, flush installations in machinery, construction, and automotive applications. The high tensile strength and hardness make them suitable for heavy-duty fastening, ensuring long-term reliability without frequent replacements.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with Class 2A fit for precise dimensional accuracy and easy assembly. It meets ASME B18.6.3 specifications for consistency and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.