S-90279A084 2-56 x 3/4" ASME B18.6.3 Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Enhanced driving efficiency with Phillips No. 1 drive design that reduces cam-out and improves installation control
• Reliable thread engagement through coarse UNC threading that provides faster assembly and better performance in softer materials
• Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B69 hardness to withstand high-stress applications
• Consistent dimensional accuracy with Class 2A thread fit ensuring proper mating and reduced cross-threading risks
• Full-threaded design offering maximum grip length and uniform load distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 standards for quality and RoHS/REACH for environmental safety

Professional Applications & Engineering Value

These zinc-plated steel rounded head screws deliver exceptional value in industrial assembly where corrosion resistance and mechanical reliability are paramount. The 2-56 UNC coarse thread configuration enables rapid installation in metal, plastic, and composite materials while maintaining secure fastening. Engineered with fully threaded construction and Class 2A thread fit, these screws provide consistent clamping force and vibration resistance in machinery, electronics, and equipment manufacturing. The rounded head profile with Phillips drive offers flush mounting capabilities with improved torque transmission, making them ideal for applications requiring both aesthetic appeal and structural integrity. Their compliance with ASME B18.6.3 standards ensures dimensional consistency across production runs, reducing assembly time and improving manufacturing efficiency.

Specification Summary & Compliance

This fastener maintains precise Class 2A thread fit tolerances per UNC standards with 3/4" length and 0.086" thread diameter. Manufacturing and quality control adhere to ASME B18.6.3 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for global industrial supply chains and environmentally conscious manufacturing operations.