S-90096A339 1/4"-20 x 1 3/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• Effortless thread cutting installation in aluminum, brass, cast iron, and sheet metal without pre-tapped holes
• Maximum torque transfer and secure fastening via the external hex head design for high-tension applications
• Enhanced load distribution and vibration resistance from the integrated flange, reducing the risk of loosening
• Reliable coarse UNC threading ensuring quick assembly and strong holding power in various materials
• Full threading along the 1 3/4" length provides consistent grip and adjustability across the entire fastener
• Industry-standard compliance with ASME B18.6.3 and RoHS 3, guaranteeing quality and environmental safety

Professional Applications & Engineering Value

Engineered for thread-cutting performance, this zinc-plated steel flanged tapping screw eliminates the need for separate tapping operations, significantly reducing assembly time and labor costs in aluminum, brass, cast iron, and sheet metal applications. The external hex head allows for high-torque installation with standard tools, preventing stripping and ensuring a tight, reliable fit. Its coarse UNC 1/4"-20 thread and blunt tip facilitate easy starting and strong thread engagement in ductile materials, while the flange distributes clamping force evenly, minimizing surface damage and improving joint integrity. Ideal for HVAC, automotive, and machinery assemblies where vibration resistance and durability are critical.

Specification Summary & Compliance

This 1/4"-20 flanged tapping screw features a fully threaded design with UNC coarse threads and meets Class 2A thread tolerances for consistent fit. Manufactured in compliance with ASME B18.6.3 specifications and RoHS 3 (2015/863/EU) standards, ensuring material safety and performance reliability for industrial use.