S-91773A533 1/4"-20 x 1/4" 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, ideal for harsh industrial environments
• Exceptional holding power from 100,000 psi tensile strength and fully threaded design for maximum load distribution
• Reliable thread engagement with Class 2A thread fit and UNC coarse threads ensuring secure fastening in various materials
• Optimized drive performance featuring Phillips No. 3 drive for efficient installation with standard tools
• Enhanced durability with Rockwell B100 hardness maintaining structural integrity under repeated stress
• Rounded head design provides smooth surface profile while maintaining adequate head height for secure seating
• Regulatory compliance meets ASME B18.6.3 specifications and environmental standards for global industrial applications

Professional Applications & Engineering Value

These 1/4"-20 UNC Rounded Head Phillips Screws deliver critical performance advantages in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The 18-8 Stainless Steel composition, enhanced by passivated finish, provides exceptional protection against chemical exposure and atmospheric corrosion in manufacturing facilities, marine applications, and food processing equipment. The fully threaded design ensures maximum thread engagement along the entire shank length, distributing clamping forces evenly to prevent joint failure in vibration-prone assemblies. With coarse UNC threads and Class 2A thread fit, these screws offer superior installation characteristics in both metallic and non-metallic substrates, reducing the risk of cross-threading while maintaining precise tolerance control. The combination of 100,000 psi tensile strength and Rockwell B100 hardness ensures these fasteners maintain their mechanical properties under sustained loads, making them ideal for structural frameworks, machinery assembly, and heavy-duty equipment maintenance.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit tolerance for consistent performance across applications. These rounded head Phillips screws comply with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The 1/4"-20 UNC coarse thread configuration ensures reliable engagement in various materials. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming these fasteners meet current environmental safety standards for industrial use worldwide.