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North American Aviation "Duz-All" Flight Wrench  
User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Posted (5 years 5 months 1 week 6 hours ago) and read 8135 times:
AIRLINERS.NET CREW
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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


Intentionally Left Blank
12 replies: All unread, jump to last
 
User currently offlinePhoenix9 From Canada, joined Aug 2007, 2546 posts, RR: 8
Reply 1, posted (5 years 5 months 1 week 5 hours ago) and read 8128 times:

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.
User currently offlineLowrider From United States of America, joined Jun 2004, 3220 posts, RR: 10
Reply 2, posted (5 years 5 months 1 week 4 hours ago) and read 8112 times:

Did you buy it? If not let me know. I will.


Proud OOTSK member
User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Reply 3, posted (5 years 5 months 1 week 4 hours ago) and read 8109 times:
AIRLINERS.NET CREW
DATABASE EDITOR



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



Intentionally Left Blank
User currently offlineTF39 From United States of America, joined Jul 2006, 110 posts, RR: 0
Reply 4, posted (5 years 5 months 1 week 4 hours ago) and read 8108 times:



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.


User currently offlinePhoenix9 From Canada, joined Aug 2007, 2546 posts, RR: 8
Reply 5, posted (5 years 5 months 1 week 4 hours ago) and read 8102 times:



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.
User currently offlineThirtyEcho From United States of America, joined Dec 2001, 1656 posts, RR: 1
Reply 6, posted (5 years 5 months 1 week 3 hours ago) and read 8083 times:

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.

User currently offlineHAWK21M From India, joined Jan 2001, 31702 posts, RR: 56
Reply 7, posted (5 years 5 months 1 week 1 hour ago) and read 8066 times:


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

regds
MEL.



Think of the brighter side!
User currently offlineXT6Wagon From United States of America, joined Feb 2007, 3424 posts, RR: 4
Reply 8, posted (5 years 5 months 5 days 17 hours ago) and read 7939 times:

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.


User currently offlineLowrider From United States of America, joined Jun 2004, 3220 posts, RR: 10
Reply 9, posted (5 years 5 months 5 days 13 hours ago) and read 7891 times:



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.



Proud OOTSK member
User currently offlineJetstar From United States of America, joined May 2003, 1658 posts, RR: 10
Reply 10, posted (5 years 5 months 5 days 12 hours ago) and read 7881 times:
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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


User currently offline474218 From United States of America, joined Oct 2005, 6340 posts, RR: 9
Reply 11, posted (5 years 5 months 5 days 11 hours ago) and read 7861 times:



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.


User currently offlineJetlagged From United Kingdom, joined Jan 2005, 2571 posts, RR: 25
Reply 12, posted (5 years 5 months 5 days 9 hours ago) and read 7824 times:

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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