A nut is the companion to the bolt, the most commonly utilized fastener in machinery. Commonly a nut comes in one of two standards, metric or SAE and can be measured much like a bolt, via head size thread size and thread pitch. Many applications require special types of nuts, such as nylon locking or ovoid locking (exhaust nuts) so be careful and always buy hardware based on intended use, in addition to sizing. euromotiv specializes in identifying the correct nut for European vehicle applications. Please contact us if you are having difficulty finding the correct hardware for your project, especially when working on engine, drivetrain, and suspension work where correct hardware is crucial.