Videos

Nut and Bolt Thread Checker

A tool for decoding nuts and bolts

If you do any sort of modification, repair work, or just have a big bin of assorted bolts and machine screws that you want to sort through, you really need one of these. It has both male and female threads in the most common gauges, in both metric and SAE. It takes all the guess-work out of the “what the heck bolt do I need?” problem. — Jordan Bunker

-- Donald Bell 06/21/19

(Cool Tools has a YouTube channel with many more tool reviews — editors)

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