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Author Topic: Bulk Quarter-Turn "Dzus" fastener purchase  (Read 9718 times)

Offline fsaviator

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Bulk Quarter-Turn "Dzus" fastener purchase
« on: September 20, 2010, 08:17:31 PM »
Hi all,

I am looking into purchasing some DZU fasteners for my flight deck.  I’ve researched quite a bit and have received a quote from DFCI Solutions, the makers of the actual aircraft fasteners.
Before I accept the quote, I want to see if anyone else is interested in hopping on board with this, as they are considerably cheaper, the more you buy.

In the interest of keeping prices down, I’ve looked into two part numbers with several finishes.  The finishes are Z3BT (Zinc plate) and BOC (Black Oxide over Copper).  I was told that other finishes aren’t kept in stock, and these were the cheapest.  As they only had one grey finish, and it wasn’t a stock item, I guess it doesn’t matter as I’ll be painting them anyway.  The Zinc ones are much cheaper.

Interestingly enough… the non-MILSPEC fasteners (3522) are more expensive…  go figure.

Here is a link to the datasheet for the 3506 series.  These are the MILSPEC DZUs we all know.  The thickness I plan to order are the .110 to .119 panel thickness.  Can anyone see a flaw in that?

http://www.dfcis.com/engineering/C3506-SCARevG.pdf
http://www.dfcis.com/binary/pa-3500.pdf

Anyway, I’m looking at ordering 3506-SC43A-Z3BT. 

They only have 98 in stock and it is a 10 week lead time if out of stock.  I was going to order 100, but this would work.  Now, I’m deploying for eight months in a couple of weeks, so I don’t have an issue waiting 10 weeks.  Here’s the price breakdown:

100+ is $3.14 each
200+ is $1.89 each
500+ is $1.26 each
And so on until 50,000+ for $0.89

I’ve got to reply fairly soon to the quote, so jump on now if you are interested

Warren
Warren "MTN385"
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Offline Boeing Skunk Works

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #1 on: September 20, 2010, 10:28:50 PM »
You do realize that you need the tool to install these into the panel right?
Why yes...I am a rocket scientist...

Boeing, Collins, Gables, Sperry, PPG, Korry, Pacific Scientific, Honeywell

Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #2 on: September 20, 2010, 11:27:19 PM »
I have seen the tool, but I plan to use them in acrylic panels.  Based on looking at actual panels and fasteners, it appears that "crimped" in or not, they should function.

Am I correct in my assumption?

Warren
Warren "MTN385"
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Offline Boeing Skunk Works

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #3 on: September 21, 2010, 08:52:21 AM »
I can't answer that one for sure. I should think they would work. I thought you were using aluminum.
Why yes...I am a rocket scientist...

Boeing, Collins, Gables, Sperry, PPG, Korry, Pacific Scientific, Honeywell

Offline jackpilot

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #4 on: September 21, 2010, 04:06:11 PM »
Warren

It can be done and it works fine



BUT... the acry panels are too thick for the Dzus to catch the rail wire.
so you have to drill slightly (+_ 1mm) a cylindrical hole to allow the big part of the Dzus to sink in the panel  and you need this 3/8" (10mm very close) cylindrical type of bit:



These "holes" must be done with a press drill very carefully, long process, but it is definitely doable.

PS: I can sell you 100 or more Dzus. Bought far too many years ago. PM me.
Jack

« Last Edit: September 21, 2010, 04:19:44 PM by jackpilot »


Jack

Offline autocadplease

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #5 on: September 21, 2010, 11:49:49 PM »
Where do you guys buy the rails? Are they just grounding bars from electrical panels?
« Last Edit: September 21, 2010, 11:52:02 PM by autocadplease »
Grant D.
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Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #6 on: September 22, 2010, 12:44:00 AM »
I measured my panels and they are .110" thick.  The DZUs I'm looking at allow for a panel thickness of .110 to .119".

As you can see from this screenshot of the specs, the panel thickness is accounted for:



The only drilling that should be required is to drill the panel holes large enough (in this case .255") for the DZU to fit through.

As for the rails, the same company sells the rails.  I have a ground bar in front of me...  while the holes look to be spaced the same distance apart, the holes are much to big.

Warren
Warren "MTN385"
Washington

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Offline autocadplease

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #7 on: September 22, 2010, 12:53:39 AM »
Thanks, Warren.
Grant D.
Nelson, B.C.
FSX PM Boeing TH2Go

Offline ETomlin

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #8 on: September 22, 2010, 08:33:07 AM »
Where do you guys buy the rails? Are they just grounding bars from electrical panels?

No. They appear that way but there is a thin wire that runs thru the center of the rail that allows the hook to latch onto, thereby keeping the panel in place.
Eric Tomlin
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Integral Lighted Panels, Products, Consultation, & Suppliers

Offline autocadplease

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #9 on: September 22, 2010, 11:37:46 AM »
Thank you, Eric.
Grant D.
Nelson, B.C.
FSX PM Boeing TH2Go

Offline ETomlin

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #10 on: September 23, 2010, 07:43:13 AM »
Sure Grant. If I think about it I will try to take a picture of it. I actually didnt understand this concept until the night before you posted your question, because a fellow Learjet builder sent me some rail to see how it works.
Eric Tomlin
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Offline NAX228

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #11 on: September 23, 2010, 11:52:52 AM »
I have a *real* frame for my overhead, so I could use a bunch of these... Will save me a lot of plunder
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Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #12 on: September 23, 2010, 09:23:30 PM »
Nax,

just dropped the purchase order last night.  Here's the deal though, I can probably up the amount but....  it's a ten week turn around then.  No issue for me as I won't get a chance to use them until next June, but if you don't mind waiting 10 weeks or so, I'll change the purchase order to include what you need.  It will drop the price a bit.  My wife can send them out to you when they come in.

Alternately, I can pass you the info and you can order your own.

Warren
Warren "MTN385"
Washington

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Offline NAX228

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #13 on: September 24, 2010, 04:22:19 AM »
Hi Warren
Just proceed with your order. I can eventually order on my own. Please report back how they fit your panels.
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Offline ETomlin

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #14 on: September 24, 2010, 07:48:28 AM »
Sure Grant. If I think about it I will try to take a picture of it. I actually didnt understand this concept until the night before you posted your question, because a fellow Learjet builder sent me some rail to see how it works.

Just wanted to show that I took two photos for you Grant. Not sure how to imbed them, but See them here: http://www.cockpitbuilders.com/gallery/displayimage.php?pos=-450
Eric Tomlin
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Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #15 on: September 24, 2010, 09:02:08 AM »
Hi Warren
Just proceed with your order. I can eventually order on my own. Please report back how they fit your panels.

NAX, I just received a quote from another company (American Ring) that has them in stock, any amount up to 500.  Pricing is the same as the other company (DFCIS), except for 100 to 200.  They are about 10 cents cheaper each.

I only need 100.  If you want in now, I can add yours now.  Let me know.
Warren "MTN385"
Washington

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Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #16 on: September 24, 2010, 11:59:37 AM »
Just to add to Eric's pics for those that are interested.

Here's a picture of the actual rails on an overhead:



This picture shows a comparison of the rails with a circuit grounding bar:



This picture shows the back side of a CVR, and the Dzu fasteners.  As you can see in this photo, the quarter-turn fasteners lock into the wire when turned:



In this photo you can see the relationship between the fasteners and the rail:



This photo, while hard to see, shows the fastener locked in to the wire from the rear.



The issues we've been talking about here in the thread are such:


As mentioned, normally a tool is used to "crimp" or install the fastener in the aluminum panel so it doesn't fall out or twist.  You can see that in the third picture above.  The necessity is there in a real plane where these panels are pulled all the time for maintenance.  In reality, once we put it in there it really won't be touched again in the sim until a bulb burns out or we upgrade.  I see no reason to permanently fasten them in, and twisting isn't an issue really.

The other issue discussed was having to drill out the panel. to countersink the fastener.  I'm hoping that won't be necessary as you can order the fasteners for different thickness panels.  I'm hoping the ones I order are close enough to the thickness so as to not be an issue.  This is where I'll be the guinea pig and hopefully help someone out down the road.

Hope this helps

Warren
Warren "MTN385"
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Offline AceTeam

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #17 on: October 05, 2010, 04:51:32 PM »
Hi Warren,

I can provide you these fasteners for less :-)

Condition. NOS.



Ali
« Last Edit: October 05, 2010, 04:54:52 PM by AceTeam »

Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #18 on: October 05, 2010, 07:58:01 PM »
I'm kind of committed at this point...  I just received samples of each size today.

Can you send me a price comparison by order size?

Warren
Warren "MTN385"
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Offline autocadplease

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #19 on: October 05, 2010, 08:19:57 PM »
Sure Grant. If I think about it I will try to take a picture of it. I actually didnt understand this concept until the night before you posted your question, because a fellow Learjet builder sent me some rail to see how it works.

Just wanted to show that I took two photos for you Grant. Not sure how to imbed them, but See them here: http://www.cockpitbuilders.com/gallery/displayimage.php?pos=-450

Thank you very much, Eric and Warren for the pics! Interesting system.
« Last Edit: October 05, 2010, 08:22:10 PM by autocadplease »
Grant D.
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Offline AceTeam

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #20 on: October 06, 2010, 01:51:54 AM »
Warren,

$105 CAD = 100 pcs set



Ali

Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #21 on: October 06, 2010, 02:08:01 AM »
Warren,

$105 CAD = 100 pcs set



Ali

Are we talking about actual DZUs, or are we talking about M4 or similar threaded DZU reps?  If actual, what size?  All sizes?  I we're talking about threaded DZU reps that's fine too as I need some for my pedestal.

You're price's are great, so regardless, based on this thread (and a similar one at MC.org) there is an interest.  There are a few guys on the other forum that are looking to purchase 100-250 pieces.  Check out my thread with the same title as this one.
Warren "MTN385"
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Offline AceTeam

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #22 on: October 06, 2010, 08:25:32 AM »
These are real (actual) DSUZ fasteners used in Boeing 737, 727 panels.  No replica.

No, I don't have all sizes. Just the ones for Boeing 737, 737 Panels.


PM me your email address and I'll send you a picture.

Please tell others to contact me if they need real DSUZ fasteners :-)

Ali

Offline NAX228

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #23 on: October 06, 2010, 11:35:10 AM »
I measured my panels and they are .110" thick.  The DZUs I'm looking at allow for a panel thickness of .110 to .119".


Is this inches?
I'm into the metric system... those french guys... bringing in a whole new system when you got a perfectly working one already...
Does 2,8 mm sound alright?
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Offline fsaviator

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Re: Bulk Quarter-Turn "Dzus" fastener purchase
« Reply #24 on: October 06, 2010, 05:13:00 PM »
I measured my panels and they are .110" thick.  The DZUs I'm looking at allow for a panel thickness of .110 to .119".


Is this inches?
I'm into the metric system... those french guys... bringing in a whole new system when you got a perfectly working one already...
Does 2,8 mm sound alright?

Yes, it is inches...  0.11 inch = 2.794 millimeter

The funny thing is I usually do everything in mm.  I grew up in Europe so I was raised with both, but find the metric system easier to work with.  multiples of ten...  ten fingers...  ten toes...  I see a pattern
Warren "MTN385"
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