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The Permanentech self-locking vibration-proof nut and bolt fastener has a unique nut that locks in at predetermined intervals along the notched bolt, removing the chance for vibration to loosen the ...

Over the past few weeks we've looked at handy flexible hose clamp pliers, screw-holding screwdrivers and battery desulfators that rescue batteries from the dead. This week's cool tool, the nut and ...