S-90096A400 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 for extended service life in demanding industrial environments
• Efficient installation through Type F thread cutting design that creates mating threads without pre-tapping in aluminum, brass, cast iron, and sheet metal
• Enhanced load distribution with integrated flange design that eliminates the need for separate washers and provides superior clamping force
• Versatile drive options with combined external hex/slotted head for flexibility in tool selection and torque application
• Reliable coarse threading with UNC 1/4"-20 specification that resists loosening under vibration and ensures quick assembly
• Full-length threading for maximum grip strength and consistent performance across the entire fastener length
• Industry-standard compliance meeting ASME B18.6.3 specifications for guaranteed dimensional accuracy and mechanical properties

Professional Applications & Engineering Value

This heavy-duty tapping screw delivers exceptional value in metal fabrication and assembly operations where thread-cutting capability is essential. The zinc-plated steel construction provides reliable corrosion protection while maintaining the high tensile strength required for permanent fastening in aluminum, brass, cast iron, and sheet metal applications. The flanged hex head design eliminates washer requirements while providing superior bearing surface contact, preventing material deformation and ensuring consistent clamping force. With its coarse UNC threading and Type F tapping geometry, this screw creates precise mating threads in pre-drilled holes (using No. 2 drill bit), significantly reducing installation time and labor costs compared to traditional tapping methods. The combination of external hex and slotted drive offers flexibility for both power and manual tool applications across various production environments.

Specification Summary & Compliance

This 1/4"-20 tapping screw features UNC coarse threads with standard right-hand direction and full threading along its 1 3/4" length. Manufactured to exacting ASME B18.6.3 standards (SAE J933) ensuring dimensional precision and mechanical performance. The product is RoHS 3 (2015/863/EU) compliant for environmental safety and meets all specified requirements for use with No. 2 drill bit (0.221" diameter) in various metal substrates.