9mm fasteners?

[monkeyspanners]

Bought some Gedore spanners on ebay, mixed styles, think they are old stock clearance.
Anyway there is a 9mm ratchet spanner and am curious where you would find 9mm headed fasteners used as i can't recall ever seeing one!

 

[Dave455]

You're right! Don't think any of the various metric 'standards' feature a 9mm!

I have used one though - seem to remember it was a bleed ******!

 

[venturesomerite]

I found some in an electronics cabinet that I was taking apart (it was to be scrapped) and I was picking out usable hardware, nuts bolts etc. I left them in cause why would I want to have those in my arsenal and consulate be baffled why a 10 is too big but an 8 won't fit.

I have yet to see them anywhere else again.

 

[drtyler]

I have seen them on bleeders as well.

You're right! Don't think any of the various metric 'standards' feature a 9mm!

I have used one though - seem to remember it was a bleed ******!

 

[Rosso]

VW Clutch pressure plates use a 9mm 12 point bolt.

 

[redwrench60]

I hammer them over bolts and nuts that are supposed to be 10mm but are too severely corroded to get a grip with the proper size. I've encountered only a very few actual 9mm fasteners out there but they do exist.

 

[steveo3002]

vw clutch and some B pillar weather strips on 80s/90s euro fords

 

[skruft]

I agree, 10mm is common and 9mm rare, but I have used it.

 

[Cmjl67]

Don't think I've ever used one, except to discover it don't fit - useful to work out if fastener 8 or 10 mm

 

[shoggoth80]

I want to say that I have seen some on motorbikes?

 

[dutchgray]

Had this discussion with a guy I work with, I never use the 9, he does on Japanese motorbikes frequently.

 

[wyo george]

Had this discussion with a guy I work with, I never use the 9, he does on Japanese motorbikes frequently.

I'd be interested to know where? I work on bikes for a living and restore old bikes as a hobby and I can't recall ever using a 9mm


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[dutchgray]

I'd be interested to know where? I work on bikes for a living and restore old bikes as a hobby and I can't recall ever using a 9mm


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I wouldn't know, he just said he did, he may have been taking the piss though as he is like that, he used to drag race a Suzuki powered machine that had extensive modifications for the purpose.

 

[short4stuff]

Rusted 10mm, 3/8" = 9mm.

 

[MrNatural]

There are 9 12pt 9mm on a VW 1.9 sdi clutch cover. I use a 1/4 sd mini torque wrench and set them at 14nm, though this would be the same as " good and tight" using a small 12pt 9mm Combi at a push (note a previous mechanic had left out 3 cover bolts over 100k ago, so the absolute correct torque is not overly important.) Slack practice though!

 

[M6erfan]

yep, they show up on older motorcycles...

 

[K-Dog]

Ford quarter glass is held on with 9mm nuts for some years.

 

[Ruger_556]

International EGR cooler core removal tool guide rods have 9mm flats.

 

[Olafur]

It seems every time an oddball fastener is discussed, VW gets mentioned.
One more reason to avoid them.

 

[Olafur]

There are 9 12pt 9mm on a VW 1.9 sdi clutch cover. I use a 1/4 sd mini torque wrench and set them at 14nm, though this would be the same as " good and tight" using a small 12pt 9mm Combi at a push (note a previous mechanic had left out 3 cover bolts over 100k ago, so the absolute correct torque is not overly important.) Slack practice though!

Brave man, working flat rate(?)
However the bolts he left out seem to be close to forming a triangle so possibly not causing to much balance issues.

 

[RedneckWelder]

I used 9mm once just don't recall where. It was something wierd for sure though.

 

[SMKS]

I've used 9mm a bunch on bicycles.

 

[newspeed]

I have never once used a 9mm. I always thought they were included in sets to avoid skipping sizes.

 

[rodsnratfinks]

I've used 9mm a bunch on bicycles.

Where?

 

[bsaint]

I just used 9mm the other day on a Kubota engine but can't remember where...

 

[monkeyspanners]

Thanks for the replies! Looks like i will have to get a VW or a Kubota, wouldn't be safe on a bike

 

[bsaint]

Lol. Well you never know maybe you'll get a killer deal on a Kubota RTV!

 

[1foxracing]

KTM motorcycles and I want to say I've used it on Vespa scooters as well.

 

[SMKS]

Where?

Mounts for derailers, bolts holding levers in place, etc. It's just a sized used frequently on vintage Asian and modern bikes.

I'm surprised no one else has mentioned it yet. It has come up in the other "where are 9mm used" threads.

 

[MrNatural]

Brave man, working flat rate(?)
However the bolts he left out seem to be close to forming a triangle so possibly not causing to much balance issues.

Well spotted. The dudes crazy logic must have been: if I leave one out, then I must leave another two out, and then in forming a triangle of ommission, the flywheel/clutch remains balanced, and the remaining 66.66 percent won't vibrate loose and grenade the bellhousing during the warranty period?

Perhaps, he lost a 9mm bolt and then adopted that balancing logic, thinking the fact that the assembly remains in balance, will offset the 33.33 percent reduction in clamping force?

The bolts are only 2 cms long and take mere seconds to spin in, so it would appear an unnecessary omission even for a guy trying to beat the book time?

I hope the guy did not go near aircraft engines, and its another good argument for doing your own maintanence, and know that it is done right.

 

[trxrx7]

I have also used it on a b bleeder ******, believe it was on an e46 bmw caliper

 

[rodsnratfinks]

Mounts for derailers, bolts holding levers in place, etc. It's just a sized used frequently on vintage Asian and modern bikes.

I'm surprised no one else has mentioned it yet. It has come up in the other "where are 9mm used" threads.

That's so weird, I've built over a hundred road and mountain bikes, but I can't remember ever using a 9mm. I believe you, though. When you say vintage Asian, are you talking Nishiki, Miyata, Univega type bikes, or cheaper bikes?

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[dgjaxun]

the front brake calipers on my mom's 08 expedition were held on by 9mm allans which pissed me off when i had to go to work to get a socket when i did not have one at home

 

[Olafur]

Well spotted. The dudes crazy logic must have been: if I leave one out, then I must leave another two out, and then in forming a triangle of ommission, the flywheel/clutch remains balanced, and the remaining 66.66 percent won't vibrate loose and grenade the bellhousing during the warranty period?

Perhaps, he lost a 9mm bolt and then adopted that balancing logic, thinking the fact that the assembly remains in balance, will offset the 33.33 percent reduction in clamping force?

The bolts are only 2 cms long and take mere seconds to spin in, so it would appear an unnecessary omission even for a guy trying to beat the book time?

I hope the guy did not go near aircraft engines, and its another good argument for doing your own maintanence, and know that it is done right.

I think you are spot on regarding what this guy was thinking. First thought was possibly to remove one on the opposite site, but looking at the bolt pattern - this would leave bigger gap in the pattern than removing the middle bolt of each 3 bolt cluster.

Brave man!

 

[SMKS]

That's so weird, I've built over a hundred road and mountain bikes, but I can't remember ever using a 9mm. I believe you, though. When you say vintage Asian, are you talking Nishiki, Miyata, Univega type bikes, or cheaper bikes?

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Are you choosing to use 3/8 or something that's close enough instead of 9mm?

 

[rodsnratfinks]

Are you choosing to use 3/8 or something that's close enough instead of 9mm?

No, I just can't remember offhand when I've used one on a bike.

 

[Ron Swanson]

Rusty brake bleeders.

 

[franzdom]

What's the question? Of course there are uses for 9mm wrenches. What is more surprising to me is how many nice hex key sets (think PB Swiss) don't include a 7mm, or even offer them in singles.

 

[speed bump]

Somewhere there is a pretty extensive thread detailing all 9mm uses. Personally I have only seen it on a Honda nighthawk front brake bleeder.

 

[4x4gearhead]

I have used 9mm wrenches on grease fittings found on European equipment. Been wrenching 10 years and that's the only time I've used them haha