Key stock for machine key parts or bars are used to transmit torque from a component to the shaft. At Grainger you\'ll find low-carbon Woodruff key stock for remountable machinery keys designed to be install deep into shafts. You\'ll also find zinc-plated steel key stock for couplings, sprockets and pulleys. When you have both those needs and more in your facility, you\'ll find the right combinations in Key stock assortments from Grainger.