NUTS !

[lexie467]

Can anybody tell? I have bought and looked for Mini restoration bult, nut and washer kits. But not ever found the real thing. Half of the contents has never fitted a Mini or the quality of mostly china fasteners are poor or bad material. One of these bolt case wizards
managed to store the contents into four flat boxes at an enormous weight ( where 50 % was not useable ) and the freight to me in Sweden was stupid. So, do anyone have a tip where I URGENTLY can find the right item and why not at least GRADE 9.
Tommy

[Ollie78]

I recently bought some high tensile and zinc plated UNF fasteners from Namrick-the nut and bolt store. I guess shipping to Sweden might be a expensive.

[dklawson]

How about A-Series Spares? They may have a kit for what you want.
http://www.aseriesspares.co.uk/fastener ... t_168.html

[Smiffy]

I recently bought some high tensile and zinc plated UNF fasteners from Namrick-the nut and bolt store. I guess shipping to Sweden might be a expensive.

A mate bought the Namrick selection box, lets just say he'll be alright for washers for the foreseeable future.

[Spider]

Most of the original fasteners were Grade 5 or Grade 8. I have to say, I've never seen a Grade 9 before, not to say they don't exist, but just saying I've never seen them in a Mini over the past 30+ years. Many Cap Head Bolts (eg Unbrako) are Grade 10 or 12 depending on the diameter.

This chart may help Identify what you have;-

[Ollie78]

I made a selection of exactly what I wanted on the Namrick website, its easy to navigate. I did notice they do UNF and UNC selection packs but wanted mostly 1/4" and 5/16" UNF. I thought they were grade 8.8 but I'm not sure?

[minimans]

I made a selection of exactly what I wanted on the Namrick website, its easy to navigate. I did notice they do UNF and UNC selection packs but wanted mostly 1/4" and 5/16" UNF. I thought they were grade 8.8 but I'm not sure?

I hope not 8.8 is a designation for a metric bolt! unless of course you have a late mini then I guess they may be OK?

[Vegard]

Do anyone know if one can get 5/16 UNF bolts with 7/16AF heads anywhere?
Like used on the A+ engines.

[Frogeye61]

The chart is completely correct. Imperial sized bolts are available in grade 2, 5 and 8, indicated by the markings of none, 3 radial lines and 5 radial lines on the head.
Metric bolts are identified by the numbers 8.8 for the equivalent to grade 5, 10.9 for grade 8. Umbrako are tougher still and used in extreme applications (or where a box wrench won't fit in).
See http://www.lelandpowell.com/metric.htm
You will notice a 100% strength increase from grade 2 to grade 5, but only a 25% increase from grade 5 to grade 8 and then 13% increase to umbrako.

But in the interest of safety and economy, don't use grade 2 at all, except to hold something that is not stressed at all (like mounting a tachometer to the dash). Use grade 5 for everything that even has a little stress, up to moderate or even some highly stressed components. For highly stressed and safety related applications, use grade 8.

Examples; Austin Healey Sprite A-frame pivot bolts are grade 5. They simply don't take the stress necessary for more strength and I've never seen one break. They are also bushed with rubber which removes stress peaks.
The clinch bolt that holds the steering shaft to the rack pinion does not need to be grade 8. The stress is nowhere near 120000 psi.
When was the last time you saw a broken wheel stud. That's where you need grade 8 or more.

Airplanes are built with equivalent to grade 5 except where stresses require grade 8. And we trust them don't we.

[Ollie78]

Hmm.. No the bolts are UNF not metric, the Namrick UNF HT bolts are Grade 'S' - 50-55 Tons per square inch yet in the technical section on the site it says this

rough.jpg

I'll have a look at the markings on the heads of the bolts and see what they say, I think they just have an S on.

[dklawson]

I'm sure the 8.8 designation is a minor mistake on the Namrick web site or an intentional cross-reference for those more familiar with metric fasteners. Their use of the term "grade" is also a mistake when used with the 8.8 rating.

At work I have gotten my hand slapped a couple of times for semantics regarding bolts. Imperial fasteners (UNC and UNF) are specified by "grade" (i.e. grades 2, 5, & 8 as mentioned above). Metric bolts do not use the term "grade". Their strength is by "class" (class 8.8, 10.9, or 12.9).

There are also a fair number of asian fasteners on the market that misrepresent what they are. Be careful when buying. In particular, avoid any zinc plated Imperial fasteners marked as grade 5 or 8. Common grade 5 & 8 bolts are not zinc plated due to problems with hydrogen embrittlement. This also applies to metric class 10.9 and 12.9 bolts. These higher strength fasteners are commonly given a yellow zinc-chromate or or black oxide coating. Zinc plated grade 2 (or metric class 8.8) bolts are common and because they are made with a different alloy, not subject to hydrogen embrittlement.

[dgear1984]

I have used this company for many years, and dad has used them for many years before me. They are really helpful, they will sell single items so no need to buy a whole box of each size. There has been very very few times they have been unable to help, even still sell Ba, whitworth etc.

Maybe if you know exactly what you want ask them for a price and shipping to sweeden.

Hope thats helps

[Spider]

I'm guessing here that Namrick may be listing them under an equivalent metric grade, dunno, and I wouldn't really like to second guess on that. I'm pretty sure that what the other guys have said here though is correct.

Here's the second half to that chart I posted yesterday with the Metric Range;-



They do of course go lower than 8.8, I think down to 3.something, unsure as I don't use many Metric Fasteners.

So, that's bolts, their fairly easy to sort from the head markings, what can get tricky though are nuts as the markings are sometimes hard to see and near impossible as the correct grade of washers to go with this lot!