S-90403A834 10-24 x 3/4" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated internal-tooth lock washer that maintains clamp force in high-shock environments
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial conditions
• High-strength performance with 60,000 psi tensile strength and Rockwell B69 hardness for demanding applications
• Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening and easy installation
• Optimized drive efficiency using Phillips No. 2 drive for secure tool engagement and reduced cam-out risk
• Complete thread coverage with fully threaded design providing maximum holding power along the entire fastener length
• Industry-standard compliance meeting ASME B18.13 specifications for dimensional accuracy and performance reliability

Professional Applications & Engineering Value

These zinc-plated steel screws with internal-tooth lock washers provide critical vibration-resistant fastening solutions for industrial machinery, electrical enclosures, and automotive assemblies. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance under dynamic loads, while the Class 2A UNC coarse threads facilitate quick installation in production environments. The zinc-plated steel construction offers essential corrosion resistance for demanding industrial settings, and the Phillips pan head design with integrated washer eliminates separate component handling, streamlining assembly processes. These fully threaded screws maintain consistent clamping force across the entire engagement length, preventing loosening in high-vibration applications where fastener integrity is paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threads (10-24 size) ensuring consistent performance. These rounded head screws comply with ASME B18.13 specifications for mechanical fasteners and meet critical regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards. The 3/4" length with fully threaded design provides maximum engagement capability while maintaining the specified tensile strength and hardness characteristics throughout the fastener.