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SHOP NOW The Mighty Knob and Tri Knob Locknut work with any bolt that has a 1/4-20 thread. These work great for mounting anything that you want to install or uninstall quickly. Commonly used with T bolts for installing seats and accessories on Fishing kayaks.
The Mighty Knob has plastic threads that tighten but do not lock.
The Tri Knob Locknut has a stainless steel locknut nested inside.