S-93882A106 4-40 x 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in demanding industrial environments
• Effortless installation through thread forming design that creates strong, permanent threads without pre-tapping in steel, aluminum, brass, and cast iron
• Enhanced grip and stability with flanged hex head design that distributes clamping force evenly and prevents loosening under vibration
• Quick assembly efficiency with external hex drive that allows high-torque application using standard tools for faster production cycles
• Reliable thread engagement with UNC coarse threading that provides superior holding power in softer materials and sheet metal applications
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries and international markets
• Versatile material compatibility specifically engineered for multiple metals including steel, aluminum, brass, and cast iron applications

Professional Applications & Engineering Value

These 4-40 UNC thread forming tapping screws deliver exceptional engineering value by solving common fastening challenges in metal assembly operations. The zinc-plated steel construction provides critical corrosion protection while maintaining high tensile strength for durable connections. The thread forming design eliminates the need for separate tapping operations, creating precise internal threads that resist vibration loosening and material fatigue. With their flanged hex head configuration and external hex drive, these screws offer superior torque transmission and seating force distribution across a wider surface area. This combination makes them ideal for industrial applications involving steel, aluminum, brass, and cast iron components where reliability and installation efficiency are paramount. The coarse UNC threading ensures secure fastening in both thick and thin materials, from heavy machinery to sheet metal enclosures.

Specification Summary & Compliance

These flanged hex tapping screws feature precision 4-40 UNC coarse threads with standard Class 2A tolerance for consistent fit and performance. The 1/4" length and fully threaded design provide maximum engagement in various material thicknesses. Manufactured to SW tapping screw standards for thread forming applications, these screws are engineered for use with No. 41 drill bits (0.097" diameter) for proper hole preparation. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance for industrial procurement.