S-90821A420 Length 2" Tapping Screws

Key Features & Benefits at a Glance

• Eliminates pre-drilling requirements with integrated drilling tip that penetrates up to 0.187" thickness in aluminum and sheet metal
• Superior corrosion resistance through 18-8 stainless steel construction with galvanic barrier coating for harsh environments
• Enhanced load distribution from the integrated flange design that eliminates the need for separate washers
• High-torque installation capability with external hex drive head design for secure fastening in demanding applications
• Maximum thread engagement through fully threaded design that ensures superior holding power throughout the fastener length
• Reliable thread formation using BSD thread forming technology that creates strong, vibration-resistant connections
• Industry-standard compatibility with No. 12-14 thread specification for easy replacement and standardization

Professional Applications & Engineering Value

These flanged hex head tapping screws are engineered specifically for aluminum and sheet metal applications where corrosion resistance and installation efficiency are critical. The 18-8 stainless steel construction with galvanic barrier coating provides exceptional protection against galvanic corrosion when fastening dissimilar metals. The integrated drilling tip (No. 3 type) eliminates the time-consuming pre-drilling process, reducing labor costs by up to 50% in high-volume assembly operations. The thread forming design creates precise, strong threads in parent material without generating chips, making these BSD type screws ideal for electrical enclosures, HVAC systems, and automotive assemblies where debris contamination must be avoided. The external hex drive ensures reliable torque transmission even in confined spaces, while the flange provides superior clamping force distribution.

Specification Summary & Compliance

This No. 12-14 x 2" tapping screw features precision right-hand threads with 14 threads per inch and fully threaded design for maximum engagement. Manufactured to industry standards for thread forming screws with BSD type specification. The fastener meets standard dimensional tolerances for inch-system fasteners and is manufactured using 18-8 stainless steel with galvanic barrier coating for enhanced corrosion protection. Compliant with relevant industrial fastening standards and manufactured under quality systems ensuring consistent performance in aluminum and sheet metal applications.