S-91735A033 2-56 x 1" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
• High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable load-bearing performance
• Precision thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Enhanced durability through passivated surface treatment providing improved wear and chemical resistance
• Optimized drive efficiency with Phillips No. 1 drive design for secure tool engagement and reduced cam-out risk
• Full threading coverage along the 1" length for maximum grip strength and uniform stress distribution
• Regulatory compliance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 316 stainless steel rounded head screws with 2-56 UNC coarse threading deliver exceptional performance in demanding industrial settings. The passivated finish significantly enhances corrosion resistance, making them ideal for marine, chemical processing, and food industry applications where moisture and corrosive agents are present. The Class 2A thread fit ensures precise mating with corresponding nuts and threaded components, reducing the risk of cross-threading during assembly. The Phillips No. 1 drive provides reliable torque transmission while the pan head design offers a low-profile installation suitable for confined spaces. With full threading across the entire 1" length, these machine screws maintain consistent clamping force and prevent loosening under vibration, addressing critical fastening challenges in machinery, equipment manufacturing, and structural assemblies.

Specification Summary & Compliance

These rounded head screws feature precision 2-56 UNC coarse threads with Class 2A tolerance ensuring dimensional accuracy and proper fit. Manufacturing conforms to ASME B18.6.3 specifications for consistent quality and performance. The products are fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meet REACH (EC 1907/2006) requirements for chemical safety, making them suitable for global industrial applications with strict environmental regulations.