S-90048A254 Length 2 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments.
• Efficient thread forming design creates strong, permanent threads in sheet metal without pre-tapping, reducing assembly time and labor costs.
• Optimal flush mounting with standard 82° flat head profile and Phillips drive for clean finishes and secure fastening in sheet metal applications.
• Full-length threading ensures maximum grip and load distribution across the entire fastener length for enhanced joint integrity.
• Precision compatibility with No. 21 drill bits (0.159" diameter) and 0.025" maximum material thickness for reliable, repeatable installations.
• Wide industry acceptance as an A/AB type tapping screw with right-hand threads, meeting common assembly requirements.
• Environmental and regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets.

Professional Applications & Engineering Value

This No. 10-12 x 2-1/4" zinc-plated steel tapping screw is engineered specifically for sheet metal fastening, where vibration resistance and pull-out strength are critical. The thread forming design eliminates the need for separate tapping operations, reducing production steps and minimizing the risk of cross-threading in thin materials. With its Phillips flat head and 82° countersink angle, it provides a secure, flush fit that prevents snagging and maintains aerodynamic or aesthetic surfaces in HVAC, automotive, and electronics enclosures. The fully threaded body and pointed tip ensure quick starts and consistent engagement, delivering reliable performance in high-volume manufacturing environments.

Specification Summary & Compliance

This fastener features a No. 10 screw size with 12 threads per inch and 0.19" thread diameter, manufactured to standard inch system tolerances for consistent fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The A/AB tapping screw type with right-hand threading and thread forming method is designed for reliable performance in sheet metal applications up to 0.025" thickness, using a No. 21 drill bit for precise hole preparation.