S-90390A144 10-24 x 1" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding industrial environments.
• High-torque installation capability provided by the T20 Torx drive, reducing cam-out and tool slippage for efficient assembly.
• Effortless thread creation in pre-drilled holes thanks to the Type F thread-cutting design, eliminating the need for separate tapping operations.
• Reliable fastening in various metals including aluminum, brass, cast iron, and sheet metal, ensuring broad application versatility.
• Secure, flush-mount installation with a standard 82° flat head profile, ideal for countersunk applications requiring a smooth surface finish.
• Optimized for quick assembly with UNC coarse threading and a fully threaded shank, providing consistent holding power along the entire length.
• Compliance with environmental standards (RoHS 3), making it a responsible choice for global manufacturing and supply chains.

Professional Applications & Engineering Value

This 10-24 UNC T20 Torx tapping screw is engineered to solve critical challenges in metal fabrication and assembly. Its zinc-plated steel body offers excellent durability against oxidation, while the thread-cutting (Type F) design allows it to form its own mating threads in ductile materials like aluminum, brass, and cast iron, eliminating the risk of stripped threads and reducing installation time. The T20 Torx drive ensures maximum torque transfer, preventing damage to the screw head and driver—a common issue in high-volume production. The coarse UNC thread and flat head with an 82° countersink provide a secure, vibration-resistant fit in sheet metal and other thin-section applications, making it a reliable industrial fastener for machinery, enclosures, and structural components.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a No. 10-24 thread size and coarse spacing for robust engagement. The dimensional profile includes a 0.362" head diameter and a 1" length with a fully threaded shank, ensuring precise fit in pre-drilled holes (recommended No. 17 drill bit, 0.173" diameter). It is manufactured as a Type F tapping screw with a right-hand thread direction and blunt tip. Compliance with RoHS 3 (2015/863/EU) is confirmed, meeting environmental regulations for hazardous substance restrictions.