{Stus-List} Rusty Nuts

cscheaffer at comcast.net cscheaffer at comcast.net
Tue Jun 2 15:07:39 EDT 2009

Gotta love this list. 

Looks like PB Blaster worked well on bronze or brass stuffing box and aluminum refrigerator light bulb & socket. 

Maybe Liquid Wrench works better on steel or iron parts more commonly used to make diesel engine blocks, and drive shaft couplings? 


----- Original Message ----- 
From: "Micheal LeVine" <levine at bnl.gov> 
To: cnc-list at cnc-list.com 
Sent: Tuesday, June 2, 2009 12:47:28 PM GMT -05:00 US/Canada Eastern 
Subject: Re: {Stus-List} Rusty Nuts 

>From my own personal experience I have to cast some doubt on the results below. 
I had a stuffing box nut that was impossible to break loose. I tried copious amounts of 
Liquid Wrench and it just didn't work. I tried this over a period of 2 weeks, spraying on each 
visit to the boat.  Nada.  

On the advice of someone on a Sailnet forum, I tried Power Blaster. In 15 minutes following 
the application, the nut came free. 

The nut and stuffing box are brass, so perhaps the chemical composition of corrosion in my 
case was different from that of a steel nut rusted to a bolt. 

I have even used Power Blaster to free a light bulb in my home freezer. It was so badly corroded that 
I was afraid I would break the glass if I tried too hard to unscrew it. One shot of PB and it unscrewed 
with no effort. My wife thinks I am a genius. Who am I to argue with the Admiral? 

That's my 2¢ worth. YMMV. 

S/V Tachyon  

On Jun 2, 2009, at 12:00 PM,  N7FN at aol.com  wrote: 


I don't know how accurate this is, got it through another e-mail  source.   
Also, I haven't had a chance to try it.   
I thought that with all of the rusty nuts out there  someone might give it   
a  try and report back to us. 

Good luck, 


FOR YOU MECHANICS OUT THERE?????.SAVE  $$$$..............BUCK???? 
Machinist's Workshop magazine actually tested penetrants  for break out   
torque on rusted nuts.   

Significant results! They are below, as forwarded by an  ex-student and   
professional machinist, Bud Baker.   

Don't forget the April 2007 "Machinist's Workshop"  magazine comparison   

They arranged a subjective test of all the popular  penetrants with the   
control being the torque required to remove the nut from a  "scientifically   
rusted" environment.   
Penetrating oil ..... Average  load   

None ...................... 516  pounds   

WD-40 ................... 238  pounds   

PB Blaster .............. 214  pounds   

Liquid Wrench ........ 127  pounds   

Kano Kroil ............... 106  pounds   

ATF-Acetone mix.......53  pounds   

The ATF-Acetone mix was a "home brew" mix of 50 - 50  automatic   
transmission fluid and acetone.   

Note the "home brew" was better than any commercial  product in this one   
particular test.   

Our local machinist group mixed up a batch and we all  now use it with   
equally good results.   

Note also that "Liquid Wrench" is about as good as  "Kroil" for about 20%   
of the  price.   

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