S-90420A370 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Eliminates pre-drilling requirements with integrated drilling tip that penetrates up to 0.098" thick steel, stainless steel, and sheet metal
• Superior corrosion resistance through 18-8 stainless steel construction with galvanic-barrier coating for extended service life
• Enhanced installation stability featuring 0.348" flange diameter and 1/4" hex head for secure fastening and reduced slipping
• Optimized thread engagement with No. 8-18 thread forming design that creates strong, permanent threads in base materials
• Time-saving installation combining external hex drive with fully threaded design for quick, efficient assembly
• Reliable performance in demanding applications through right-hand thread configuration and BSD tapping screw standards
• Versatile material compatibility specifically engineered for use in steel, stainless steel, and sheet metal applications

Professional Applications & Engineering Value

These flanged hex head tapping screws deliver exceptional engineering value by solving critical installation challenges in metal fabrication and assembly. The thread forming BSD design eliminates the need for separate tapping operations while creating strong, strip-resistant threads in base materials. The galvanic-barrier coated 18-8 stainless steel construction prevents corrosion and galvanic reaction when joining dissimilar metals, making these tapping screws ideal for outdoor equipment, electrical enclosures, and HVAC systems. The combination of drilling tip technology and external hex drive streamlines installation in confined spaces, reducing labor costs and improving production efficiency in sheet metal and stainless steel applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This No. 8-18 x 1-1/4" tapping screw maintains precise dimensional accuracy with 0.164" thread diameter and 18 threads per inch configuration. Manufactured to BSD tapping screw standards with right-hand threads and fully threaded design for consistent performance. The external hex drive and flanged head provide secure installation with 0.348" flange diameter and 1/4" head width. Complies with industry standards for thread forming screws and features RoHS and REACH compliance for environmental safety in industrial applications.