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  #1  
Old 11-12-2021, 04:42 AM
74-07 74-07 is offline
 
Join Date: Dec 2016
Location: Greenville, SC
Posts: 632
Default When stainless isn't stainless

I am in the process of an avionics upgrade which requires the installation of the red cube. My installation requires two 1/4 inch NPT to #6 AN straight fittings. I am installing all stainless steel fittings FWF. I found the fittings on Amazon and ordered them. They arrived yesterday and I immediately noticed that they sure seemed light. I pulled the packaging out of the garbage and saw that they are stainless steel "colored" aluminum. The ad clearly states they are stainless steel. They aren't. I just wanted to give everyone a heads up,
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  #2  
Old 11-12-2021, 04:58 AM
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plehrke plehrke is offline
 
Join Date: Sep 2006
Location: Defiance, MO
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Default

Good reason why I don’t buy any parts or materials that go in my airplane from Amazon or any other non-aircraft internet seller. Amazon has especially become a huge source for stuff being sold that is mis-represented, counterfeit, or bait and switched. I have received multiple examples of all three. Definitely buyer be warned.
I do consider local non-aircraft part suppliers (like Lowe’s or Adv Auto) as I can touch and read their packaging before I buy.
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Last edited by plehrke : 11-12-2021 at 05:27 AM.
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  #3  
Old 11-12-2021, 05:04 AM
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PaulvS PaulvS is offline
 
Join Date: Aug 2019
Location: Western Australia
Posts: 835
Default misleading ad

The advertisement seems to contradict itself because initially it states that the Material is Aluminum but then further down it says made from 303 stainless??
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  #4  
Old 11-12-2021, 06:34 AM
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DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 10,468
Default

The net is awash in garbage fittings.

If you need to go off the reservation for non-AN stainless steel, I'd suggest Parker or Eaton . Both are reputable manufacturers with a large network of local dealers.

Search "Parker Triple Lok" and "Eaton Flare Twin".

I prefer stainless firewall forward, but have no issue with good plating. Do not use black oxide coated steel fittings for fuel systems; too easy to get internal rust flakes. They are oil and hydraulic only.

Tom, you out there? Does TS Flightlines stock the small selection of common SS fittings we might use firewall forward?
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Last edited by DanH : 11-12-2021 at 06:39 AM.
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  #5  
Old 11-12-2021, 06:46 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 6,381
Default Not only scams- but no way to correct errors in listing.

I wanted a ShopVac high efficiency filter. They are out of business.Only Amazon ad had the right part number, incorrect dimensions, and a correct photo. The customer comments (2 yrs old) had it measured close to correct. I ordered (for free shipping) and they were exactly like the original dimensions but not filter material. I measured and posted with others to let folks know - - then tried to get Amazon to correct the listing. There is not a single place to do that. I tried the chat bot - no joy, real person chat-no joy - - I called and spoke to a person. They sounded just like the bots reading a script - -lots of word dancing - -then they committed to write a trouble ticket and pass to the advertising department.

I won't try to help them again - just bad ratings. The big A remains as my last resort and only non-critical items.
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  #6  
Old 11-12-2021, 07:35 AM
mdevans9 mdevans9 is offline
 
Join Date: Jan 2006
Location: Hockessin,Delaware
Posts: 229
Default Thanks, Dan!

"Do not use black oxide coated steel fittings for fuel systems; too easy to get internal rust flakes. They are oil and hydraulic only."

Another gem from Dan Horton.

Merrill
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  #7  
Old 11-12-2021, 07:50 AM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,957
Default

Hi Dan----uhhhhhh yep.
Tom
p/s---Steve and I are thinking about a FWF adapter kit with stainless for the engine fittings and our MIL aluminum fittings for the sender manifold (VA168 and equivalent). Havent determined if we can justify this or not, but maybe some feedback here can sway or thoughts. I was thinking of the stainless with class 3 threads like our MIL aluminum fittings we have or our cabin brake systems that ALOT of you have. MOST stainless that you buy from industrial suppliers have class 2 threads.

Any feedback here?
Tom
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  #8  
Old 11-12-2021, 08:56 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
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Tom, I'd say yes. We need a reliable vendor for these things. And I'm happy with the stainless -3 fittings you sold me for my brake system.

Dave
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  #9  
Old 11-12-2021, 09:01 AM
KayS KayS is offline
 
Join Date: Jul 2009
Location: lake constance
Posts: 434
Default

Quote:
Originally Posted by mdevans9 View Post
"Do not use black oxide coated steel fittings for fuel systems; too easy to get internal rust flakes. They are oil and hydraulic only."

Another gem from Dan Horton.

Merrill
I have these black fittings all over the place in my fuel system. Maybe it's worth to discuss that point in more detail.
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  #10  
Old 11-12-2021, 09:10 AM
BoydBirchler BoydBirchler is offline
 
Join Date: Jul 2020
Location: Indianapolis
Posts: 141
Default

Local industrial hose fabricators, located in most every area, call aviation 37 degree fittings; 75 degree. Prices and quality of the product are good.
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