{Stus-List} Rusty Nuts

Rick Brass rickbrass at earthlink.net
Sat Jun 13 23:08:01 EDT 2009

FWIW, PB Blaster is pretty much the “Gold Standard” penetrating oil among
the techs at the forklift and construction machinery dealers I’ve worked
with over the years.


OTOH, the most common use of WD40 seems to be as diesel starting fluid. It’s
a lot less explosive that ether and has its own lubricating value.


Rick Brass


From: cnc-list-bounces at cnc-list.com [mailto:cnc-list-bounces at cnc-list.com]
On Behalf Of Micheal LeVine
Sent: Tuesday, June 02, 2009 12:47 PM
To: cnc-list at cnc-list.com
Subject: Re: {Stus-List} Rusty Nuts


>From my own personal experience I have to cast some doubt on the results

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


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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