Jam nuts are shorter or low profile nuts that are about half the height of a normal nut. A jam nut is used in conjunction with a finished hex nut to limit the possibility of loosening in heavy vibration applications.
We are promoting Milwaukee tools in March with our Milwaukee March Madness sale. The sale runs the whole month of March while supplies last. We have select M18 & M12 Milwaukee batteries, M18 tools and M12 tools on sale. These are popular everyday tools at deeply discounted prices that we cannot publicly advertise. We have several tools and batteries available for under $100 and in some cases under $50. Come down to our store to take advantage while supplies last.