S-90065A144 Length 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments.
• Efficient thread forming design creates strong, permanent threads in sheet metal without pre-tapping, reducing assembly time and labor costs.
• Precise flush mounting with an 82° undercut flat head that sits perfectly flush in countersunk holes for smooth, snag-free surfaces.
• Reliable driving performance using a standard No. 2 Phillips drive for secure torque transfer and reduced cam-out risk during installation.
• Full threading along the 1/4" length ensures maximum grip and uniform load distribution across the entire fastened joint.
• Optimized for thin materials with a maximum drilling thickness of 0.025", ideal for precision sheet metal assemblies.
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, sustainable use in global markets.

Professional Applications & Engineering Value

These No. 6-20 thread forming screws are engineered specifically for sheet metal applications, where material integrity and joint reliability are critical. The 18-8 stainless steel composition provides excellent resistance to oxidation and chemical exposure, making these Phillips flat head tapping screws suitable for outdoor equipment, electronic enclosures, and HVAC systems. The undercut flat head profile with an 82° countersink angle allows for a clean, flush finish that prevents protrusion in tight spaces. By eliminating the need for separate tapping operations, these fully threaded screws streamline production lines, reduce fastener inventory, and minimize the risk of strip-out in thin-gauge metals up to 0.025" thick. Their right-hand threading and pointed tip ensure quick, accurate starts and consistent seating in pre-drilled holes sized for No. 32 drill bits.

Specification Summary & Compliance

This product adheres to standard inch measurements with a No. 6-20 thread size (0.138" diameter, 20 TPI) and 1/4" length. The flat head features a diameter of 0.262" and height of 0.059", designed for an 82° countersink. Manufactured as Type A thread forming tapping screws with a round shank cross-section and fully threaded, pointed tip. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free of hazardous substances and safe for industrial use.