How to loosen a rusty nut

If a rusty nut does not Unscrew, don't get excited and try to disrupt it – there are many effective ways to empty it without wasting effort.

2015-11-17 12:18:35 159

nutthreaded connectionrusty nutfaces nutnut boltunscrew rusty nut

Why not Unscrew a rusty nut

The main cause of jamming of rusted joints is corrosion of the metal. In the process of rusting of metal products of its oxidation reaction, or more simply – rust, greatly increase in volume, tightly grasping among themselves the details of the associated threaded connection. Additionally the situation is aggravated by contact with the threaded surfaces of small particles of dust and dirt.

Selection tool

The success of the difficult loosening of threaded connections is largely dependent on the instrument being used. Do not try to Unscrew a rusty nut using the open end wrench. The weakness of the construction of such tool will cause the jaws of the wrench will simply disperse to the sides and hop the face of the nut and a small length of the tool will not allow you to make the necessary effort. In such a situation it is better to opt for the flare keys or to use a set of sockets with a ratchet – faces and nut are intact, and hands. With regard to the integrity of the hands. To avoid injury, loosening of threaded connections in tight spaces by applying hand force to the tool to avoid foreign objects in the direction of movement of the hand with a key or knob.

Dissolve rust

If, despite the Herculean efforts, the nut is not amenable, it is not necessary to force the tool to pace yourself and excessive exercise. Moisten a rusty carving liquid, is able to partially dissolve the rust and thereby reduce the friction forces. The Arsenal of such fluids is quite wide: from the special rust Converter and well-known WD-40 to gasoline, diesel fuel, kerosene, turpentine and brake fluid. By the way, is effective at rust ordinary table vinegar and alcohol solution of iodine from automobile kits. In an extreme case, fit even Pepsi - or Coca-Cola, containing phosphoric acid. Abundantly moistened zajavlenie connection and after waiting from 10 minutes to half an hour, you can take up an instrument and try to loosen a stubborn nut. If after this thread not be, and time allows, it is advisable to wrap the screw fitting with a cloth dampened with one of these fluids and leave it for an hour or two. Most nuts after this procedure slowly, but turned off, especially if you act on them by working the tool back and forth, that is, vraskachku.

Instead of unscrewing – screwing

Original and very useful way to destroy the layer of rust, but instead of unscrewing a small nut is tightened. After the nut is a little move towards tightening, though it is, tight, but will squirm.

Tapping faces

For this procedure, you will need a small 100 gram hammer. Applying light blows with a hammer along the edges of the nut should alternately move from one face to another around the circle. Encountered in the process of tapping microcracks slowly, but inevitably lead to deformation and destruction of rust. The main thing is to avoid heavy hammer blows, which may affect the faces of the nut, the bolt to bend or even break the part that bonded them.


Using a heat source (a gas burner, blowtorch, lighter, matches, candle, soldering iron, construction ordinary hair dryer or boiling water) to heat the nut, trying to cool the bolt or stud on which it sits. When heated nut will expand and increase in volume, become a few microns wider than the bolt that will greatly facilitate the process of unscrewing.Besides, due to uneven heating of the layer of rust on the threaded connection is destroyed and will lose its former strength. Be extremely careful when working with open flame and heating devices!


Method is undesirable, but in some cases, sometimes the only one able to solve the problem of rusted threaded connections. Armed with a hammer and a sharp chisel is needed to break the grooves on the faces of the stubborn nut. Uniform implementation of chisel from all sides will lead to its deformation and increasing the internal diameter that will allow you to effortlessly Unscrew it from the thread. In the end, the threaded connection can be destroyed, having sowed the bolt with a angle grinder or hacksaw, you can knock the nut, bolt overlogging sharp chisel, you can cut it in half along the axis of the bolt and try to drill out using a drill. In all these cases, nut and bolt, upon completion, will be hopelessly spoiled.In order to avoid problems with loosening the nut, lubricate before tightening the threaded surface of the Litol, graphite, Teflon or silicone lubricants. Let you will succeed! Good luck to you!

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