How to Remove Rusty Bolts and Nuts

Getting a rusted nut off a rusted bolt can be tricky.

Rust affects many different kinds of metal, but when it affects a nut and bolt that are joined together, they can be particularly hard to remove. That's because the rust forms between the threads on the nut and bolt, making them almost one unit. Depending on the age and rust level of the hardware, the two components can be separated in just a few minutes, or it may take a good chunk of time to get it done.

Things You'll Need

• Rust penetrating spray
• Propane torch
• 1/2-inch breaker bar
• 1/2-inch ratchet and socket set
• Angle grinder with cut-off wheel

Instructions

1. Spray the connection of the bolt and the nut liberally with rust penetrating spray. Allow the two parts to soak for at least an hour. Attempt to separate the nut from the bolt using the 1/2-inch ratchet and socket, or the 1/2-inch breaker bar, keeping in mind that using the breaker bar will give you more leverage, but may break the bolt.

2. Heat the nut on the bolt with a propane torch until it's red hot. Then attempt to remove the nut using the 1/2-inch ratchet and socket or the 1/2-inch breaker bar.

3. Cut the nut off the bolt using the angle grinder and the cut-off wheel. This will destroy the hardware, but if the other two options don't work, this can be used as a last resort.

Tips & Warnings

• When using the torch, make sure there is nothing flammable nearby. Keep a fire extinguisher close.