Hi all

On the early m20 deluxe type models, they were equipped with a rubber mount handlebar assy

Keeping all this in place were 2 large retaining nuts, part reference 15-5285

Does anyone have the following information
Thread type
Thickness
Head size ( spanner size)

I need to get these made up as I I have to try salvage what I have left of the assy

Many thanks

John

email (option): Jonnyob1@googlemail.com

Job
It is 33 mm across the flats( a 3/4" whit worth) spanner fits. 5mm thick, sorry I don't know the TPI

The nuts aren't just flat sided nuts. The inner face of each nut is curved to fit the shape of the washers which are also curved (slightly conical) this is to ensure even pressure on the washers/rubbers.
to give an idea of what I mean the curved side of each nut would fit snugly on the surface of a sphere about the size of a football.
here's a shot showing the shape which is followed by both the locking washer & the nut inner face....
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Thanks all

The main holder requires work & the threads are damaged also, maybe too much to be recovered, but I do want to try

Now that I know the sizes - the thread type will be next confirmation needed

If anyone has that I would be grateful to hear from you

Best regards

John

email (option): Jonnyob1@googlemail.com

Probably coarse cycle wont be able to check for a day or two.

Hi John,I have the necessary info,I did post on Facebook,you probably missed it.
I will see what I can do for you,I will need that part to sort the threads out,
PM me,cheers Rick

email (option): richardholt@rocketmail.com

RE measurements
they aren't 5mm thick, that wouldn't leave enough for the chamfer & for the inner scalloped shape. they definitely are closer to 8mm when I just measured 4 on bikes.

Yes, height is 7.7mm with a concave to match the thick washers. Threads are 1 1/16 x 20 TPI.

John, I have two chromed nuts lying around here doing nothing, one reasonable, one pitted. There are yours if you like. Can be restored and replated but you probably better have some new ones made. Contact me if interested than I will make some pictures.

Regards, Michiel

email (option): m.wijbenga[at]hotmail.com

Hi Rick
Was working outside UK all last week - so still catching up - I must have missed your fb post - I'll check it again - thanks for offer
Be in touch with you once I have it off the frame so

Job

email (option): Jonnyob1@googlemail.com

Hi folks

Thanks to all of you for your help

I have only the holder for this assy at the moment & had thought the retaining nut was flat, you learn everyday on this forum

I can get rubbers from Austria but other parts are difficult to obtain

If anyone has parts to make up a set, please contact me

Michiel, let me know how much you are looking for these parts please, if you are over for netley we can meet there if ok with you

Many thanks once again

Jo'b

email (option): Jonnyob1@googlemail.com

Hi Rik

We had none of that kind of talk in holy ireland years ago

Easier to get mind enhancing substances than rubbers back in the day

:-D

Job

email (option): Jonnyob1@googlemail.com