12 replies to this topic

[Chelsea_Pete]

Hi everyone, I'm replacing the rear heelboard where there are 4x captive nuts to mount the rear subframe trunions.

I bought 2 repair panels (magnum) from mini Soares and it seems that the nut thread is too small for the 5/16" unf bolts supplied in the mounting kit.

Has anyone else encountered this?
Is it usual to re-tap the captive nuts to better accept the mounting bolts?

The bolts will cut their own thread if encouraged, but that doesn't feel like a good idea..


http://www.minispare...ssic/MS51R.aspx

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[Lplus]

You shouldn't have to retap the threads although excess paint/protective coating may make them a tight fit.  The panel inserts being non genuine are you sure the captive nuts are actually UNF thread and not metric? .

[Chelsea_Pete]

You shouldn't have to retap the threads although excess paint/protective coating may make them a tight fit. The panel inserts being non genuine are you sure the captive nuts are actually UNF thread and not metric? .

Yes I shouldn't think they'd need tapping. The paint probably isn't helping but they're definitely wanting to cut a new thread into the nut, can't think why any replacement panels would be supplied with metric nuts though, all the mounting kits appear to be be imperial

Edited by Chelsea_Pete, 01 July 2023 - 11:19 AM.

[nicklouse]

First thing I would to is check what the threads actually are before putting any thing into them.

[Lplus]

 

You shouldn't have to retap the threads although excess paint/protective coating may make them a tight fit. The panel inserts being non genuine are you sure the captive nuts are actually UNF thread and not metric? .

Yes I shouldn't think they'd need tapping. The paint probably isn't helping but they're definitely wanting to cut a new thread into the nut, can't think why any replacement panels would be supplied with metric nuts though, all the mounting kits appear to be be imperial

 

The mounting kits are made for both existing and new genuine mounting points.  That doesn't preclude a non genuine panel insert having the wrong nuts on it, after all the kits are not made by the same company.  It was just a thought since I can't see why a 5/16 UNF bolt should actually try to cut a new thread in a 5/16 UNF threaded hole.

[Chelsea_Pete]

Yep so looks like I've been sold a metric panel and imperial bolts, no surprises there really!
Maybe a lesson learned here about buying non genuine repair panels ..

Edited by Chelsea_Pete, 01 July 2023 - 11:33 AM.

[Lplus]

Yep so looks like I've been sold a metric panel and imperial bolts, no surprises there really!
Maybe a lesson learned here about buying non genuine repair panels ..

At least it should be easy enough to get some long 8mm metric bolts.  I'm assuming you checked with a metric bolt as the other possibility would be 5/16 UNC captive nuts.  Either way Minispares should be made aware.

[nicklouse]

Yep so looks like I've been sold a metric panel and imperial bolts, no surprises there really!
Maybe a lesson learned here about buying non genuine repair panels ..

More like you bought them rather than being sold them.

 

but yes this can be an issue with non original spec parts. Not hard to change the nuts if you have not fitted the panels yet. Or as suggested get some suitably rated Metric bolts.

[sonikk4]

This is not the first time that this has happened with metric captive nuts being fitted rather than The correct items

I will not buy Magnum heelboard repair panels, I either make my own or buy Heritage. Yes there is a cost but at least with Heritage you get the correct captive nuts.

But a lesson to all here, no matter what panel you buy add some more weld to the captive nut, that way you shouldn’t end up with a spinner. I found that out the hard way

[mini-mad-mark]

Similar subject on a different item.

 

I bought a pair of track rod ends and when they arrived one nut was missing - no problem I thought, just bung on an M10 as that seems to be the standard size now - didn't fit and when I looked more closely it was a finer thread so then I thought "ah must have gone back to 3/8" UNF" - that didn't fit, so I measured the pitch and it turned out to be M10 x 1.0mm extra-fine........ Why?  (for anyone unfamiliar M10 standard pitch is 1.5mm and there is also fine at 1.25mm)

 

I did contact the supplier but never received a nut (which I asked for first as I then had to buy 5 on Ebay as a relatively "special" size that I don't have) or any answer as to why they were manufactured with that thread instead of M10 std which has been used for a good while now I think (after moving from 3/8 UNF some time back)

[Chelsea_Pete]

I just thought it's be worth me putting another message here as a word of warning-

after calling minispares, they confirmed that they've had problems with magnum welding in metric nuts to these repair panels, despite the bolts sold by most spares retailers incl. minispares being imperial.

Minispares even found one magnum panel with BOTH imperial and metric on the same piece. So, beware magnum everybody...

Pete

[Homersimpson]

Its a bit of a pain but just cut the nuts off and weld some new UNF ones on, if you can fit the panel then this shouldn't pose a problem.

[Chelsea_Pete]

Its a bit of a pain but just cut the nuts off and weld some new UNF ones on, if you can fit the panel then this shouldn't pose a problem.

Yes this would have been the next step, but minispares were good/embarrassed enough to send out replacement panels with the correct threads next day.