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leeds



Member Since: 28 Dec 2009
Location: West Yorkshire
Posts: 8578

United Kingdom 
Quote:




The question you should be asking of these suppliers is what is the specification of the stainless steel fasteners that they are offering for sale (exactly what are you getting for your money) and can they email you a copy of their QA certification including - Mill certificate for the original stainless steel material - who produced it and where/when? Chemical and mechanical testing (stress and rupture tests) carried out, heat treatment and coatings/plating - always useful if parts fail and legal people start asking questions?

You might just find that some of the cheap, far eastern produced, stainless steel fasteners on offer might just turn out to have been made from cheese when it comes to testing.





Now do you seriously expect a company such as Nakatanenga to tell people including possible competitors who actually makes items for them? Why not ask for detailed technical drawings and specifications whilst you are at it?

Why do you want to know when a particular nut or bolt is made? A nut or bolt does not exactly age/weaken quickly with age. Also there is not exactly a lot of room on a nut to put material/tech spec/place and depth of manufacture etc

Even if there was enough room would people understand the information? There is a lot of information on the front of a headlight and I doubt very much if the average driver has even noticed the markings let alone be able to tell if a headlight is RHD or LHD which is marked on the front of the lens.



Nakatanenga is the ONLY supplier of stainless Defender door bolts with the correct genuine heads on them. These are NOT exactly mass produced in a far eastern sweat shop of a factory. There again Nakatanenga are the only company who has stainless headlight adjustment screws, not produced in a far eastern sweatshop.

I know some of the quantities that need to be ordered to have these items specifically made for Nakatanenga. These items are not exactly readily available from your local nut and bolt stockist.

Nakatanenga does have a little bit of understanding and experience with stainless steel. That might be the very reason why Nakatanenga provides anti seize paste with their bolt kits. Oddly enough they are the only supplier who does this. Maybe other suppliers are not aware of galling or stainless steel cold welding?

YES there are lots of suppliers out there who do not fully understand what they are supplying and they are in the race to be the cheapest guy on the block. I got a phone call from one customer who asked me if the door bolts actually fitted the door hinges. He had bought a set off ebay and the bolt heads were too large for the door hinges. The ebay seller solution was to suggest to the customer that he filed/grind the heads down to size. One Nakatanenga kit and he was a happy bunny.

Have just noticed another supplier selling a stainless bolt kit for 110s with about 100 pieces in kit, no anti seize paste for £130. Our price for a VAST 110 kit for 430 pieces including anti seize paste is £99. AndrewS I might of just have had a bright idea. Price rise coming along Whistle Whistle Rolling with laughter Rolling with laughter




Morals from those stories?

1) Buy cheap, buy twice

2) Just because it is the most expensive does not make it the best.

3) Buy from suppliers who have experience, knowledge and a good reputation of dealing with stainless





Brendan
Post #382275 27th Dec 2014 12:47pm
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Cuthbert



Member Since: 26 Oct 2013
Location: Up North
Posts: 1535

Stainless steel fasteners for general automotive applications often fall way down the pecking order from what is demanded by the aerospace, off-shore, nuclear and public transportation supply chains. In those safety critical industries each nut, bolt and washer comes with traceability and issues affecting fastening dissimilar materials together is well understood.

When I see stainless steel fastenings being sold to Joe Public in packs for their treasured and beloved vehicle (car, 4X4 or motorcycle) at a wide variety of prices, I do wonder if either the supplier or end customer has any real idea of what is being bought and sold.

I'm sure that there are companies trading in this sector with integrity and backed up with solid technical expertise - but I'm also concerned that Joe Public can easily be sold 'mutton dressed as lamb'. Brendan has illustrated this point in his previous post - frightening thought "pass the grinder".

Brendan kindly draws to our attention 3 excellent morals - just make sure that on No.3 the supplier knows his stainless from his stainless. As I tried to illustrate earlier - cheese is not just cheese, just as stainless steel fasteners vary widely.

For those with an interest in stainless steel fasteners at the quality end of the market, here's a link to an English based company whose products I've become acquainted with over a long number of years.

http://www.ssfast.co.uk/about.html
Post #382378 27th Dec 2014 6:23pm
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TJ101



Member Since: 30 May 2007
Location: Taunton Somerset
Posts: 3747

Isle Of Man 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red
leeds wrote:
The tube of anti seize paste on ebay is between £20-£30. What I do not understand is why other UK suppliers will not include anti seize paste as standard or have they not heard of stainless steel cold welding?


If thats the case, Will have a set for a 110, less £25, and you can keep the past Very Happy California F1, 75th 110 "Kermit", 50th Ann V8, 90 V8 Hybrid, 55 Series 1

Main Brian James Trailer Dealer for South West UK
Post #382381 27th Dec 2014 6:29pm
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leeds



Member Since: 28 Dec 2009
Location: West Yorkshire
Posts: 8578

United Kingdom 
Well TJ the Bah Humbug season is just about finish so I can return to being my normal grumpy miserly git of a self and carry on with my Yorkshire citizenship application. Razz



Now as already has been pointed out we are not charging enough so yes you can have one of the Nakatanenga VAST 110 minus the anti stick paste for the same price of the lesser 110 kits at £130 and you will get an extra 330 stainless parts FOC which seems to me to be a very fair offer Thumbs Up Whistle



I am no metallurgist but have seen some of the specification of the stainless steel used by Nakatanenda and they are on the list on the SSF website.

Stainless bolts used for the attachment of lights and grilles to Defenders do not need the same traceability or quality control as bolts going into the nuclear or aerospace industry. We have seen some of the production plant at Nakatanenga and can ensure people that it is high quality and that they do understand stainless steel a lot better then I do.



Brendan
Post #382453 27th Dec 2014 9:32pm
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nitram17



Member Since: 09 Jun 2014
Location: newcastle
Posts: 2260

I like many people have no problem with vendors making a reasonable markup if they are selling a good product but i do object to paying over the odds !I have no knowledge of the quality of stainless steel fixings (except the quality of steel is graded)so i usually look for recomendations..........I am new to defender ownership and i am struck by the significant markup on many products.......one vendor advertising for ss 90 rear mud flap fixing bracket and asking fot £90 one vendor selling a steering boss and adding £40 to the price of an obviously rebranded item....Most sensible buyers can spot the chancers and the internet is your friend!I would take recomendations from here but i would always check the internet for other suppliers as there is always bias however unintentional if advice is provided by a vendor!
Post #384482 3rd Jan 2015 2:24pm
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mikeh501



Member Since: 07 Jan 2013
Location: United Kingdom
Posts: 1142

United Kingdom 
The ones I've bought previously are all stamped A2. Never seen anything different.
Post #384491 3rd Jan 2015 3:00pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610

United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
A4 (316)is the most corrosive resistant and the grade I come across more in the marine environment for exterior use, nevertheless the steel contains more chromium which makes it more brittle.
A2 (304)is fine and used prolifically in the automotive and other industries.

Thumbs Up If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #384503 3rd Jan 2015 4:32pm
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leeds



Member Since: 28 Dec 2009
Location: West Yorkshire
Posts: 8578

United Kingdom 
nitram17 wrote:
............Most sensible buyers can spot the chancers and the internet is your friend!I would take recomendations from here but i would always check the internet for other suppliers as there is always bias however unintentional if advice is provided by a vendor!




When I used to be active doing research we had to have any published work refereed by 3 unknown independent acknowledged experts. With the internet anybody can 'publish' anything they like with little regard to the truth or being able to back up their claims.

So treat the internet with extreme caution! Their is misinformation out their as well as good information.

Vendors can be a valuable source of information, so use them wisely.



Stainless steel is available in many different grades. A2 stainless is the common grade for stainless nuts and bolts, A4 is a marine grade stainless. The range of sizes of nuts and bolts in A4 grade stainless is not as common or as comprehensive as that available in A2.

Specialised industries, such as the nuclear and chemical industries will have their own specifications for stainless nuts and bolts and their fastenings may well be specially made for them and yes their will be complete traceability for crucial components.


However we do not require the same trace ability for stainless fittings holding on lights to a Defender.


Nakatanenga has the Defender door bolts made with genuine heads in stainless steel plus the headlight adjuster screws as these are not available as off the shelf standard items.



Brendan
Post #384519 3rd Jan 2015 5:35pm
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mikeh501



Member Since: 07 Jan 2013
Location: United Kingdom
Posts: 1142

United Kingdom 
as im about to embark on re-building my defender onto a new galv chassis im going to be buying a lot of fasteners and want to go all stainless as the body is already mainly stainless (A2).

One of the things ive read is that certain bolts on the rolling chassis cant be SS because its not strong enough, do you chaps know which bolts these are? also things where the original bolt perhaps has a unthreaded shank and a plain SS bolt wont, will that kind of thing make a diff?

about the only fine thread bolt ive come across on the body is the seat belt hanger so far!
Post #384522 3rd Jan 2015 5:41pm
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