S-90033A220 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide Steel coating, extending service life in demanding industrial environments
• Efficient thread forming technology creates strong, permanent threads without chips, reducing installation time and improving joint integrity
• Precision 82° countersink angle ensures flush mounting in sheet metal applications for clean, professional finishes
• Full threading along 1-1/4" length provides maximum grip and holding power across the entire fastener engagement
• No. 2 Phillips drive design offers secure tool engagement and reduces cam-out during high-torque installation
• Optimized for 0.025" maximum drilling thickness in sheet metal, delivering reliable performance in standard gauge materials
• Comprehensive regulatory compliance meets RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

These No. 8 Phillips flat head tapping screws are engineered specifically for sheet metal applications where vibration resistance and permanent fastening are critical. The thread forming design eliminates the need for pre-tapped holes while creating stronger threads through material displacement rather than cutting. The Black-Oxide Steel construction provides essential corrosion protection for industrial environments, while the standardized 82° countersink angle ensures perfect flush mounting in metal assemblies. These A/AB tapping screws solve common installation challenges by reducing operator effort and preventing loose connections in HVAC systems, electrical enclosures, metal framing, and machinery assemblies where reliable, long-term fastening is mandatory.

Specification Summary & Compliance

These precision tapping screws feature a 0.164" thread diameter with 15 threads per inch and Class 2A thread fit for consistent performance. The flat head profile with standard dimensions ensures compatibility with industry tooling. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making them suitable for global supply chains and environmentally conscious manufacturing operations. The screws are designed for use with No. 29 drill bits (0.136" diameter) following standard sheet metal preparation protocols.