S-91773A540 1/4"-20 x 3/4" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Reliable fastening performance through Class 2A thread fit and UNC coarse threading ensuring secure installation
• Optimized drive engagement with No. 3 Phillips drive design for efficient torque transmission and reduced cam-out
• Full-threaded design providing maximum grip length and uniform stress distribution along the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

These 1/4"-20 UNC fully threaded screws with rounded head Phillips drive are engineered to address critical industrial fastening challenges. The 18-8 stainless steel material combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for marine, food processing, and outdoor applications where moisture and contaminants are concerns. The coarse thread design ensures rapid installation and superior holding power in various materials, while the Class 2A thread fit guarantees consistent performance across production runs. These industrial-grade fasteners deliver reliable performance in assembly lines, machinery manufacturing, and structural applications where vibration resistance and long-term durability are paramount requirements.

Specification Summary & Compliance

This 1/4"-20 x 3/4" rounded head Phillips screw features UNC coarse threading with Class 2A thread fit tolerance for precise dimensional accuracy. Manufacturing complies with ASME B18.6.3 standards for mechanical and dimensional requirements. The product is fully RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) regulations regarding chemical substance restrictions, ensuring environmental responsibility and workplace safety compliance.