This Simple Addition To Your Toolbox Can Be Very Useful For Freeing Rusty Bolts






You haven’t felt real pain until you’ve tried to twist a rusted bolt, maybe even by leaning your full weight onto it, and it doesn’t even twitch. These things end up in that state because they fuse to the threads around them, and as a result, your wrench simply rounds off the corners. In situations like these, it’s important to work smart, not hard — the easiest way to do that is by using the best penetrating oils for seized bolts.

Penetrating oils are these petroleum-based products with a really low viscosity, so they run very thin. That’s actually their whole point, since regular oils are too thick to squeeze into the gap between a nut and its threads. Now, most garages do stash some WD-40 since it’s great for many everyday jobs around the garage. However, it may not always get the job done since it’s more of a multi-use spray rather than a true penetrating oil. If you’re someone who does a lot of fixing, a rusty bolt will eventually find you, so it’s always a great idea to have a good penetrating oil around.

Using it is pretty simple too. To get started, clear away any loose dirt or grime around the bolt, as that will ensure the spray actually reaches the metal. Next, soak the area generously, covering as much of the exposed surface as possible, then leave it for a few minutes to let the oil seep properly into the crevices.

Why penetrating oils work the best here

You should see the bolt turn with your wrench or socket. If it still doesn’t give somehow, hit it with another round and wait again. That should definitely do it by now. If not, then you’re dealing with a really messed up nut, and you might want to step things up and give it an overnight soak.

There’s this other method to free a rusted bolt you might be tempted to try as well. It involves heat from either a propane torch or a heat gun. It works, too. The idea is that the outer part of the nut expands more quickly, since it heats faster than the inner, causing the nut to loosen just a bit.

We are not saying that you shouldn’t try it at all, but the method just asks a lot of you. For one, fire around a garage full of flammable material is trouble. There’s also a chance of heating the bolt to the point it snaps, which turns the job into removing a broken bolt, a tougher task.

Penetrating oil sidesteps most of that. A can goes anywhere, you can aim the straw right where you need it, and you are free to do something else while it soaks. One thing to remember, though, is that it’s flammable. It’s advisable not to spray it on a part that was just heated. If a job truly needs both, the trick is to heat it, let it cool, then soak it, according to Plant Engineering.





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A 100-year-old World War II veteran was recently reunited with the tank he drove during the Battle of Iwo Jima. The tank was an M4 Sherman, and the veteran was Marine Corporal Leighton Willhite. The M4 Sherman was America’s most common tank during that war, with about 50,000 produced before the war’s end. It dominated the battlefield long after WWII.

The detective work behind the reunion of the soldier and the tank was performed by Jonathan Bernstein, Arms and Armor Curator at the National Museum of the Marine Corps. Bernstein did extensive research at the National Archives into the unique aspects of the tanks of the 5th Tank Battalion that served on Iwo Jima. It turns out that this specific tank, named “Lucky,” had countermeasures designed to minimize the effects of Japanese magnetic anti-tank mines. This included nails welded point-up onto its upper surfaces to prevent the mines from being placed flush against its upper body, where they would cause major armor damage. While the nails were gone, the weld scarring remained from where they’d been attached. Photographs shot during the battle confirmed that “Lucky” was present there on March 1, 1945. According to Bernstein, it is very rare to be able to put a specific crew together with the tank they operated, but it definitely happened here.

Corporal Willhite, who was 18 at the time, also demonstrated immense bravery when he and his commander left the tank to rescue another tank crew who became trapped. Willhite received the Bronze Star with Valor.

What role did Sherman tanks play in the Battle of Iwo Jima?

The M4 Sherman tanks, as exemplified by “Lucky,” played a key role in the Battle of Iwo Jima, where their biggest strengths and weaknesses were displayed. The volcanic sand terrain was difficult for the tanks to negotiate, causing many transmission failures for the Shermans. It’s also where three U.S. Marine divisions went up against a heavily fortified Japanese force that had no qualms about sacrificing itself to slow the Marines’ advance. 

A favorite Japanese tactic was to attack the Marines’ tanks with satchel charges strapped to their backs, detonating their charges after sliding underneath the tanks, where the armor was not as strong. Magnetic mines that stuck to the tanks’ bodies were also used by the Japanese. This led to a variety of “adaptations” made to the Sherman tanks. 

These included the welded-on nails, plus wooden planks along the sides of the tanks that protected the tanks’ suspensions and reduced the effects of shaped charges. In addition, there were other adaptations, including spraying sand onto freshly painted areas of the tank to prevent Japanese magnetic mines from adhering to it. Sections of the tanks’ tread, known as track blocks, were also spot-welded onto vulnerable parts of the tanks, such as the front and the turret, where they offered additional protection and could be accessed if spare parts were needed. According to a report from the 5th Tank Battalion on the subject of Iwo Jima, “The all-around performance of the M4A3 tank was exceptionally good.” During the five-week battle that ended in victory, 7,000 Marines died, and 20,000 were injured.

What happened to Lucky between Iwo Jima and its recovery at Camp Lejeune in 2002?

Following the victory at the Battle of Iwo Jima, “Lucky” went back to Hawaii, where it was refitted for its next planned role, showing how tanks shaped the course of WWII. Along with 71 other tanks, “Lucky” was converted into a flame-thrower tank, which replaced around 60% of its ammunition storage capacity with tanks capable of holding 300 gallons of napalm. The event that these 72 tanks were being prepared for was the invasion of Japan, which ended up not happening, thanks to the atomic bombs “Little Boy” and “Fat Man” being dropped on Hiroshima and Nagasaki, Japan, in August of 1945. This, combined with the concurrent Soviet invasion of Manchuria, led to Japan’s formal surrender in September of that year. 

Later, “Lucky” was used as a training tank for an indeterminate period, after which it was sent to Camp Lejeune, the Marine base in North Carolina. It was left in a wooded area of the base until it was discovered by some Marines in 2002, who sent it to the National Museum of the Marine Corps. And the rest is history.

The story of “Lucky” and Corporal Willhite is just one small piece of the vast World War II panorama of events that stretched across the entire world by the time it ended. It exemplifies how millions of American and other Allied soldiers were engaged in bloody battles across many different locations, fighting for a cause they truly believed in. There’s a reason that this cohort is known as “The Greatest Generation.”





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