S-90096A578 5/16"-18 x 1/2" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Excellent thread-cutting performance in multiple materials including aluminum, brass, cast iron, and sheet metal without pre-tapping
• Enhanced holding power through fully threaded design and coarse UNC thread pattern for maximum grip in soft materials
• Secure installation and removal with external hex drive design providing reliable torque transmission
• Integrated flange design eliminates need for separate washers, distributing load evenly and preventing surface damage
• Industry compliance assurance meeting ASME B18.6.3 specifications for consistent quality and performance
• Environmental regulation compliance with RoHS 3 standards, ensuring safe use in regulated applications

Professional Applications & Engineering Value

This 5/16"-18 UNC flanged hex tapping screw delivers exceptional engineering value in demanding industrial applications. The zinc-plated steel construction provides reliable corrosion protection while maintaining high tensile strength. The thread cutting design (Type F) enables direct installation in aluminum, brass, cast iron, and sheet metal without pre-tapped holes, significantly reducing assembly time and labor costs. The external hex drive ensures secure installation with standard tools, while the integrated flange provides superior load distribution and eliminates washer requirements. These tapping screws are engineered to solve common fastening challenges in metal fabrication, automotive, and machinery assembly where reliable thread formation and long-term holding power are critical.

Specification Summary & Compliance

This fastener features 5/16"-18 UNC coarse threads with standard Class 2A tolerance for consistent fit. The fully threaded design ensures maximum engagement, while the 0.676" flange diameter provides enhanced bearing surface. Manufactured to meet ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance standards. Compliant with RoHS 3 (2015/863/EU) environmental regulations, ensuring restriction of hazardous substances. Designed for use with K drill bit (0.281" diameter) for proper hole preparation in various metal substrates.