Thin profile flex top locknuts for heavy vibration

Of all our thin-profile locknuts, these provide the most secure grip and fit in locations with limited clearance. They are about two-thirds the height of typical steel-insert locknuts. By threading them up against a hex nut to secure it, you can also use them as jam nuts. Even when there is a lot of vibration, the tab on the insert prevents the nut from turning. These locknuts are perfect for machinery like compactors, shakers, and conveyors that move constantly or have abrupt starts and pauses. They are actually used to secure parts of roller coasters since they are so safe. Although these locknuts can be reused, you should use a new nut for the strongest grip because they lose some of their holding power after the first use.