S-90033A325 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide Steel finish, ideal for industrial environments where moisture and oxidation are concerns.
• Effortless installation through Thread Forming (Type A/AB) design, creating strong threads in sheet metal without pre-tapping, reducing assembly time.
• Secure, flush fastening with a standard 82° Flat Head and Phillips No. 2 drive, ensuring a clean finish and preventing snagging in tight spaces.
• Maximum grip and pull-out resistance thanks to fully threaded, pointed tip design that engages material deeply along the entire 1-1/4" length.
• Precision fit and reduced material stress with No. 10-12 thread diameter and recommended No. 21 drill bit, minimizing the risk of sheet metal cracking.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe, sustainable use in regulated industries.

Professional Applications & Engineering Value

These Black-Oxide Steel Phillips Flat Head Tapping Screws are engineered specifically for sheet metal applications, addressing common challenges like material fatigue and corrosion. The thread forming (Type A/AB) method displaces metal to create durable, high-strength threads without generating chips, which is critical in electrical enclosures, HVAC systems, and automotive panels where debris can cause failures. The combination of a fully threaded shank and pointed tip ensures rapid starts and consistent engagement, even in thin-gauge metals up to 0.025" thickness. The 82° countersink angle allows the flat head to sit flush, providing a smooth surface that enhances safety and aesthetics in visible assemblies. This design minimizes installation torque while maximizing clamp load, making these screws a reliable choice for high-vibration environments.

Specification Summary & Compliance

This product adheres to standard inch measurements with a No. 10-12 thread (0.19" diameter, 12 TPI) and right-hand thread direction. The flat head features a standard profile with a diameter of 0.362" and height of 0.116", compatible with a Phillips No. 2 drive. It is designed for use with a No. 21 drill bit (0.159" diameter) and is fully threaded over the 1-1/4" length. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring the absence of restricted hazardous substances for industrial and export applications.