ATV locknuts work to keep the carrier bearings system in place even when you're traveling over rough and tumble terrain. These parts can replace the stock nut installed on the ATV by the manufacturer so that you can enjoy frequent rides without the headaches and hassle of having to tighten the nuts each time you come back. Choosing from the different types of ATV locknuts isn't difficult if you know what you're looking for and have priorities in place for durability, performance and riding style.\
Many different types of locknuts are available for retrofitting onto your ATV. Distorted thread locknuts are the most common type to use on your ATV. Sub-types of distorted thread locknuts include toplock nuts, center lock nuts and elliptical offeset locknuts. In these locknuts, the thread deforms to lock the fastener. These locknust resist high temperatures and offer high strength and must be used with a similarly high strength fastener. The other type of locknut most commonly used on ATVs are castellated nuts. These locknuts have slots in the threads and are typically used to hold a wheel bearing in place. They are used with a low strength fastener.
Because locknuts resist loosening even under considerable torque and vibration, they are ideal for replacing stock nuts when you plan to ride your ATV off-trail. You may need to look up the torque specifications for the original parts before choosing your new locknuts. Torque measurements for lock nuts may be described in units such as ISO, DIN, IFI, ASME, SAE, AN-, MS-, NAS- or NASM-, followed by a number. Most locknuts work on ATVs built by a variety of manufacturers, although you'll want to check whether you need metric or standard sizes.