S-90273A420 6-32 x 1 3/4" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High tensile strength of 60,000 psi ensures reliable fastening under heavy loads and vibration
• Rockwell B70 hardness rating provides excellent durability and resistance to wear during installation
• Class 2A thread fit with UNC coarse threading enables quick, secure assembly and reduced cross-threading risk
• 82° countersink angle with standard flat head profile creates flush surface finishes for streamlined assemblies
• Full threading along the 1 3/4" length maximizes grip strength and load distribution across the entire fastener
• No. 2 Phillips drive design offers familiar, efficient installation with standard driving tools

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with UNC coarse threading solve critical challenges in industrial assembly applications where vibration resistance and corrosion protection are paramount. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures these Phillips drive screws maintain clamping force in high-stress environments, from machinery manufacturing to electrical enclosures. The 82° countersink angle and standard flat head profile provide seamless integration into precision components, eliminating protrusions that could interfere with moving parts or create safety hazards. The fully threaded design along the entire 1 3/4" length guarantees maximum thread engagement, distributing stress evenly to prevent joint failure in heavy-duty fastening applications across multiple industries.

Specification Summary & Compliance

This 6-32 x 1 3/4" flat head screw features precise Class 2A thread fit with UNC coarse threading (0.138" diameter, 32 threads per inch) and manufacturing compliance with ASME B18.6.3 standards. The fastener meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility in industrial applications worldwide.