There's always an opportunity to spend money on tools, and bolt removal is no exception. (A slower, but by no means less effective, the method uses a hacksaw.) You can cut the sides off the nut or cut across the base, right through the bolt. Fit it with a metal cutting blade if you have an oscillating multi-tool or a reciprocating saw. In the case of a rusted nut, the last chance of removal is to saw it off.
Grab a pair of locking pliers (aka vice grips) and adjust the tension to firmly clamp and loosen the head or nut. Again, if the head or nut is too oxidized, the wrench may not be able to engage the shape and slip. If the bolt head or nut is rusted and won't turn, spray with penetrating oil, wait, and use the correct size wrench to loosen it. It's important not to damage the shape of the hex head, so if the wrench is slipping, go with another oil application. If the bolt is threaded into an assembly and doesn't move, tap the side of the head with a hammer. Try to loosen the bolt with the socket wrench. Douse the afflicted bolt with the penetrating oil and let it sit for as long as the directions indicate. 
(If you go to an auto parts store, you'll find a variety to choose from in spray cans or bottles (Blaster, WD-40, Liquid Wrench, etc.).
The first thing to do is spray the bolt with penetrating oil. If you try to back the bolt or nut out with a wrench, the wrench won't grip the hex head, making it difficult (if not impossible) to remove. The rust can freeze the bolt in place or degrade the shape of the bolt head or the nut holding the bolt. The nuts securing carriage bolts can rust, too, making it impossible to remove them. The heads on machine bolts can get oxidized to the point where you can't tell they're there. Rusty bolts are a common sight, especially for those who spend their working days outdoors. 
At some point in a do-it-yourselfer's career, you will find yourself staring at a bolt whose head or nut is rusted in place, rounded off, or, in the worst-case scenario, the bolt itself is broken off below the surface.īut wait! Before launching your wrench into the neighbor's bushes, there are ways to remove that stripped or broken bolt. You could be working on an old lawn mower, a washing machine, or maybe you've begun restoring a classic little red wagon.
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