O-Ring: 1" ID x 1.188" OD, 0.103" Thick, Dash 120, Nitrile Butadiene Rubber MPN:ZMSCH90120

The thread forming STI tap is designed to create threads in holes without having to bottom the thread or remove material. This saves time during installation and ensures a clean, accurate cut on materials such as aluminum, brass, and mild steel making it suitable for applications ranging from plumbing to aerospace. Made of high-speed steel with an H3 thermal treatment for durability, the tap can endure high temperatures and resist wear without losing its cutting edges so it lasts longer than other taps on the market. Additionally, the bottoming tap design ensures proper thread formation eliminating slippage during assembly, and the bright finish offers resistance to corrosion prolonging its lifespan. It features a 1/4-20 UNC size suitable for most projects with an overall length of five inches making it easy to maneuver into tight spaces on your workpiece ensuring quality results time after time. Overall, the STI tap is ideal for professional craftsmen and hobbyists who require precision and durability when working with delicate materials while avoiding damage during installation.