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M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 00:23
by 70sbikes
Where can I buy these?! I've tried Orbital Fasteners, Wentin Fasteners, GWR Fasteners...
It seems these are becoming quite rare...
Trevor
(Australia)
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 08:14
by hendre
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 09:48
by simonnorthroad
found some m7 nylocs in zinc or stainless in about 30 seconds on ebay
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 11:14
by 70sbikes
Uh-huh... none of those are DIN982, they are DIN985.
Sheesh, didn't think I'd have to explain it.
The M7 nyloc nuts on a Morini are DIN982, or Type P. This means they are a little bit higher than a standard M7 nyloc nut, hence the rarity. Here's hoping some of the knowledgeable people on the forum respond...
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 11:42
by harrymuffin
The general tensile rating of all metric nuts and bolts are 8.8 tonnes and regarded as high tensile, you can get lower tensile nuts and bolts at 4.7tonnes but these are used on greenhouses and other tat from china. If you are trying to buy the nuts for your rocker gear then these HT nuts will suffice. If you are being pedantic then you should be looking for 12.7 tonnes. If you are using a torque wrench then the standard over the counter nuts will do for the rocker gear. If you are really obsessed about tensile stregth then make some youself and then use a spring washer as I have had to do on more esoteric engines that use English threads, when I have run out of my supplies from the now empty stores at RAF Pershore and used on aero engines. DIN ratings are guidence only and as they say, 'rules and DIN ratings are for guidence and wise men and the obedience of fools'.
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 12:29
by 70sbikes
It's good to know a 8.8 high tensile DIN985 will be okay for the rocker gear.
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 13:53
by Steve Brown
70sbikes wrote: ↑04 Feb 2022 12:29
It's good to know a 8.8 high tensile DIN985 will be okay for the rocker gear.
Sheeesh, I didn't think you'd have to have that explained to you.
Surprised no one pointed out it won't be original anymore either!
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 15:53
by 72degrees
Steve Brown wrote: ↑04 Feb 2022 13:53
70sbikes wrote: ↑04 Feb 2022 12:29
It's good to know a 8.8 high tensile DIN985 will be okay for the rocker gear.
Sheeesh, I didn't think you'd have to have that explained to you.
Surprised no one pointed out it won't be original anymore either!
Naughty!
When I 'rebuilt' the 'race' engine (L5, High compression 375, lightened rockers, PHBH28s) I treated it to shiny new rocker gear trunnion nuts. Still got a few. DIN985 I expect, as I got them off Ebay.
Hasn't blown up yet despite high rpm abuse while hill climbing and now being in the workhorse, so doing more miles than it used to.
It is feeling a bit 'thrumbly' lately though. Particularly since I 'fixed' the oval front engine plate mounting holes. The worn ones may have been acting as crude vibration isolation. Or perhaps more likely that after 35 year the mains and big ends are tired. Time to do a mix and match with the bottom end from the 350 version with timing side roller bearing conversion and all new bearings. Can I face splitting the cases to swap the cam across though - unless someone can sell me a known good or new 'L5'?
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 16:51
by MickeyMoto
72degrees wrote: ↑04 Feb 2022 15:53
Steve Brown wrote: ↑04 Feb 2022 13:53
70sbikes wrote: ↑04 Feb 2022 12:29
It's good to know a 8.8 high tensile DIN985 will be okay for the rocker gear.
Sheeesh, I didn't think you'd have to have that explained to you.
Surprised no one pointed out it won't be original anymore either!
Naughty! -
Yes, that's my job... 
...unless someone can sell me a known good or new 'L5'? -
Blimey. I saw a unicorn for sale the other day.
Re: M7 nylon insert nuts DIN982
Posted: 04 Feb 2022 18:41
by huub
M7 was widely used in citroen cars, your friendly Citroen garage can supply m7 fasteners (and M9!)
Re: M7 nylon insert nuts DIN982
Posted: 05 Feb 2022 08:26
by hendre
70sbikes wrote: ↑04 Feb 2022 11:14
The M7 nyloc nuts on a Morini are DIN982, or Type P. This means they are a little bit higher than a standard M7 nyloc nut, hence the rarity. Here's hoping some of the knowledgeable people on the forum respond...
https://www.google.com/search?q=m7+nylo ... nt=gws-wiz
and indeed 2CV and Burton garages will have a stock of M7 self locking nuts, don't know what DIN rating they are
Re: M7 nylon insert nuts DIN982
Posted: 05 Feb 2022 10:10
by 70sbikes
and indeed 2CV and Burton garages will have a stock of M7 self locking nuts, don't know what DIN rating they are
Top
They're DIN985's, which are about 1mm shorter than the DIN982's. Having been assured the DIN985's are okay to use, that's what I'll do.
I had no problem obtaining M6 & M8 in DIN982 sizes, it's just those darned M7's that are hard to find (the places that did have them won't ship to Australia)!
Re: M7 nylon insert nuts DIN982
Posted: 06 Feb 2022 00:13
by Steve Brown
Just wait till you have a Camel and want the M6 nyloc square nuts for the front wheel spindle clamp. Then you'll see what rare is! Plenty of plain square nuts but not nyloc.
If none were found (I got very lucky) I was about to drill and wire lock the pinch bolts but didn't want to for aesthetic reasons.
Re: M7 nylon insert nuts DIN982
Posted: 06 Feb 2022 15:23
by 3potjohn
Re: M7 nylon insert nuts DIN982
Posted: 06 Feb 2022 20:58
by Steve Brown
Not as far as I can see. I did look at their website at the time but as with everywhere else I found nothing. I emailed a load of these suppliers and hardly any even bothered to reply.
If I could find a supplier I'd buy a bag full, just because.
My search ended when over at the 2017 TT I was boring the pants off a bloke who collected and restored a particular MX bike also from Italy. He took my address and sent me 4 used but good ones from his collection of spares. So I have no immediate need but would still buy some if they showed up.