Use the Hillman Solid Shaft Collar. Shaft collars are commonly used as mechanical stops, locating components, and/or bearing faces within mechanical systems. They are easy to adjust with set screws. Shaft collars create a tight fit and greater holding power without the damage normally caused by set screws alone. To install, simply slide these collars onto a shaft and tighten the set screw to hold the collar in place. Hillman hardware is made for reliable performance. 3/8 in. shaft collar is part of the Hillman Deep Drawer program. Commonly found in power transmission applications, such as motors and gearboxes Effective on both hard and soft-material shafts Easily installed where major assembly/disassembly would otherwise be required Zinc-plated Hillman hardware for improved corrosion resistance 3/8 in. shaft collar is part of the Hillman Deep Drawer program Measures 3/8 in. ID x 3/4 in. OD x 3/8 in. thick