2H4
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North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 3:24 am

I just found this on eBay

http://i40.tinypic.com/70w0zs.jpg

http://i43.tinypic.com/2qx6bna.jpg


What the heck is this thing? Obviously a wrench of some kind, but what is it designed for, specifically? How is it used?

2H4
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Phoenix9
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 3:49 am

Some info about that is here:

http://pzphotoans122.blogspot.com/

Its an opener for a Dzus type (I"ve never heard of it either) fastener. Apparently, the slot is for easier removal of fuel caps. Very interesting find!

[Edited 2009-06-20 20:55:23]
Life only makes sense when you look at it backwards.
 
lowrider
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 4:34 am

Did you buy it? If not let me know. I will.
Proud OOTSK member
 
2H4
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 4:40 am



Quoting Phoenix9 (Reply 1):
Some info about that is here:

Many thanks, kind sir.

Quoting Lowrider (Reply 2):
Did you buy it? If not let me know. I will.

Nope. Have at it....it's all yours.

2H4
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tf39
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 4:45 am



Quoting Phoenix9 (Reply 1):
Its an opener for a Dzus type (I"ve never heard of it either) fastener

old type of fastener - pronounced like Zeus or Zoos. It is a quick-opening, quick-action type of fastener. We had them on inspection panels, APU cowelings, etc. Google "Zeus fastner" to see the images.
 
Phoenix9
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 5:01 am



Quoting TF39 (Reply 4):
old type of fastener - pronounced like Zeus or Zoos. It is a quick-opening, quick-action type of fastener. We had them on inspection panels, APU cowelings, etc. Google "Zeus fastner" to see the images.

Thanks! Seems like it is a easy-to-use with fairly strong hold...I wonder why it lost its popularity.
Life only makes sense when you look at it backwards.
 
ThirtyEcho
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 6:05 am

You will find Dzus fasteners on the front cowling inspection panel of almost any older light piston aircraft. If you ever dipsticked it, you Dzused it.
 
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HAWK21M
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RE: North American Aviation "Duz-All" Flight Wrench

Sun Jun 21, 2009 8:20 am


I guess since a common plain screwdriver could perform the same function,This tool lost out.Looks good though.

regds
MEL.
I may not win often, but I damn well never lose!!! ;)
 
XT6Wagon
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RE: North American Aviation "Duz-All" Flight Wrench

Mon Jun 22, 2009 4:24 pm

Dzus fasteners are still used in a variety of applications outside aviation...

and a proper fastener wrench does less damage to the fastener than a screwdirver. Which gets important if say its a racecar and 4 of them are holding your hood on. going to be using those fasteners alot in the life of the car, and if they fail... might be some very bad moments.
 
lowrider
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RE: North American Aviation "Duz-All" Flight Wrench

Mon Jun 22, 2009 8:06 pm



Quoting XT6Wagon (Reply 8):
Dzus fasteners are still used in a variety of applications outside aviation...

They also work well on motorcycle fairings that have to be removed on a routine basis, such as for oil changes.
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jetstar
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RE: North American Aviation "Duz-All" Flight Wrench

Mon Jun 22, 2009 8:57 pm



Quoting TF39 (Reply 4):
old type of fastener - pronounced like Zeus or Zoos. It is a quick-opening, quick-action type of fastener. We had them on inspection panels, APU cowelings, etc. Google "Zeus fastner" to see the images.

Dzus fasteners, I hated them because they didn’t last.

Quite often the “S” spring the fastener latched on to would rust out or just break from use, the open jaws that grabbed the “S” spring would break off or open wide enough that it would not grab the spring, the slot in the head of the Dzus fastener would wear out and last but not least, they would rust.

The cowling on my 1964 C-150 was held on with PK sheetmetal screws, which were time consuming to remove every time I worked on the engine, so I converted the cowling over to Dzus fasteners, which reduced the time to remove the cowling, but were nothing but problems with all the above mentioned.

In my restoration of my airplane, I probable will change over to cam locks if the holes in the cowling are not to big to take the locks, I had to enlarge the holes to take the Dzus fasteners

In the early C-150’s the cowling was mounted directly to the fuselage, so the cowling was exposed to engine vibrations, which caused cracking in parts of the cowling like the upper and lower nose caps. These vibrations also resulted in some of the cowling screws working loose, especially if the tinnerman clips that the screws attached too were worn out.

Cessna in later models shock mounted the cowling to eliminate these problems.

JetStar
 
474218
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RE: North American Aviation "Duz-All" Flight Wrench

Mon Jun 22, 2009 10:17 pm



Quoting Phoenix9 (Reply 5):
Thanks! Seems like it is a easy-to-use with fairly strong hold...I wonder why it lost its popularity

They have no, will almost no" structural strength. That is why they are used in things like cowlings, fairings, access panels and secondary structure.
 
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Jetlagged
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RE: North American Aviation "Duz-All" Flight Wrench

Tue Jun 23, 2009 12:27 am

Dzus fasteners are still used to hold instrument panels in place on the flightdeck or to hold tuning heads, avionics controllers, etc in place in the aisle stand and on the overhead. Still a quarter turn to operate.


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