S-96640A253 5/16"-18 x 1 3/4" 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 load-bearing capacity and structural integrity in demanding applications.
• Rockwell B80 hardness provides excellent wear resistance, extending service life and reducing replacement frequency.
• Fully threaded UNC coarse spacing with Class 2A fit enables quick, secure fastening and easy alignment in various materials.
• Standard 82° countersink angle and flat head design allows for flush mounting, minimizing protrusion and improving safety.
• Phillips drive (No. 4 size) offers common tool compatibility, speeding up installation and reducing labor time.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for global use.

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 high-moisture settings and the need for robust fastening under stress. The 5/16"-18 UNC coarse thread and Class 2A fit provide superior grip and vibration resistance, making them ideal for construction, machinery assembly, and automotive applications where loosening can lead to failures. The fully threaded design ensures consistent holding power along the entire length, while the standard flat head profile and 82° countersink angle facilitate seamless integration into surfaces, reducing snag risks and enhancing aesthetic appeal. By combining high tensile strength and environmental compliance, these screws deliver long-term reliability and cost savings in industrial projects.

Specification Summary & Compliance

This screw features precise Class 2A thread fit with 5/16"-18 UNC coarse spacing and right-hand threading, ensuring dimensional accuracy for consistent performance. It meets ASME B18.6.3 specifications for manufacturing quality, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global industrial use.