S-90398A203 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with chrome-plated steel construction, extending service life in demanding industrial environments
• Superior load distribution through wide truss head and integrated flat washer design, preventing surface damage and loosening
• Streamlined installation process with thread-forming A/AB tapping method, eliminating need for separate tapping operations
• Optimized for sheet metal applications with pointed tip and 15 TPI thread profile, ensuring secure fastening up to 0.025" thickness
• Reliable drive engagement featuring Phillips No. 2 drive style for consistent torque application and reduced cam-out risk
• Full-threaded design providing maximum grip strength and pull-out resistance across the entire 1-1/2" length
• Precision compatibility with No. 29 drill bit (0.136" diameter) for accurate hole preparation and optimal thread engagement

Professional Applications & Engineering Value

These chrome-plated steel sheet metal screws deliver exceptional engineering value in metal fabrication and assembly operations. The thread-forming A/AB tapping method creates strong, permanent threads in sheet metal up to 0.025" thickness, eliminating the cost and time associated with separate tapping processes. The combination of wide truss head design and integrated flat washer provides substantial bearing surface, distributing clamping force evenly to prevent material deformation and maintain joint integrity under vibration. The fully threaded pointed tip ensures quick starting and smooth penetration, while the Phillips No. 2 drive offers reliable torque transfer for consistent installation. These features make these No. 8 x 1-1/2" tapping screws ideal for HVAC systems, electronic enclosures, automotive panels, and other sheet metal assemblies requiring durable, corrosion-resistant fastening solutions.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 0.164" thread diameter and 15 TPI thread pitch, these screws maintain consistent Class 2A thread tolerances for reliable performance. The right-hand threaded design follows industry-standard fastening conventions, while the thread-forming tapping method complies with established A/AB screw specifications. All components, including the steel flat washer with 1/2" OD, meet relevant industrial standards for material composition and manufacturing quality. The chrome-plated finish provides corrosion protection in accordance with industry requirements for metal fasteners used in various environmental conditions.