S-90064A749 Length 4 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding industrial environments
• Enhanced installation efficiency through external hex drive design allowing for high-torque application with standard tools
• Eliminates pre-drilling requirements with integrated drilling tip capable of penetrating up to 0.21" thick steel and sheet metal
• Vibration-resistant fastening achieved through flanged design and thread forming technology that creates permanent, secure threads
• Maximum material engagement with fully threaded 14 TPI design ensuring consistent holding power across the entire fastener length
• Reduced assembly time and costs by combining drilling and tapping operations into a single installation process
• Broad compatibility with right-hand BSD thread forming specification suitable for various steel and sheet metal applications

Professional Applications & Engineering Value

These No. 12 zinc-plated steel tapping screws deliver exceptional engineering value in steel and sheet metal fabrication by addressing critical installation challenges. The thread forming technology creates stronger, more reliable connections than traditional cutting screws by displacing material rather than removing it, resulting in zero chip generation and improved thread integrity. The integrated drilling tip with No. 3 geometry eliminates separate drilling operations, significantly reducing assembly time while maintaining precise alignment. The flanged construction provides wider bearing surface distribution, preventing pull-through in thin materials and offering superior resistance to vibration loosening. These BSD tapping screws with external hex drive are engineered for high-volume production environments where reliability, speed, and durability are paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 0.216" thread diameter and 14 TPI thread pitch, these thread forming screws maintain consistent Class 2A thread tolerances for reliable engagement. The 4-1/2" length with fully threaded design ensures maximum thread engagement in various material thicknesses. Compliant with industry-standard BSD tapping screw specifications for thread forming applications, these fasteners feature right-hand threads and are manufactured from high-strength steel with zinc plating surface treatment for corrosion protection. Suitable for use in steel and sheet metal applications requiring maximum drilling thickness of 0.21".