S-91249A060 2-56 x 5/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and vibration resistance
• Optimized drive efficiency through Phillips No. 1 drive design preventing cam-out during high-torque installation
• Full-length threading across the entire 5/8" length provides maximum grip and uniform stress distribution
• Regulatory compliance assurance meeting ASME B18.6.3 standards plus RoHS 3 and REACH environmental directives
• Enhanced installation accessibility with rounded pan head profile accommodating standard Phillips screwdrivers

Professional Applications & Engineering Value

These 2-56 UNC pan head Phillips screws deliver critical performance advantages in precision assembly applications where material compatibility and thread reliability are paramount. The Black-Oxide 18-8 Stainless Steel construction provides excellent oxidation resistance while maintaining structural integrity in demanding environments including electronics enclosures, machinery components, and automotive assemblies. The coarse UNC threading ensures rapid installation and superior resistance to vibrational loosening, while the fully threaded design maximizes connection stability across the entire fastener length. Engineered to ASME B18.6.3 specifications, these industrial screws offer predictable performance in high-volume manufacturing applications where consistent torque values and repeatable clamp loads are essential.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit tolerance for precision assembly. Complies with ASME B18.6.3 mechanical and dimensional requirements for machine screws. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. Thread specifications conform to UNC coarse thread profile with right-hand threading direction. All fasteners are fully threaded with consistent Rockwell B70 hardness and 70,000 psi tensile strength verification.