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18mm

Yesterday's Tractor Forums
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300jk

Well-known Member
I am working on a 2007 jeep grand cherokee and need an 18mm wrench. I
just realized I dont own one. Multiple wrench sets and not a one has an
18mm. Foreign made and U.S. made. I also realized most of my metric
socket sets dont include 18mm. What gives ? Is 18mm the mystery size in
metric ?
 
(quoted from post at 14:50:41 09/04/19) A worn 3/4 will sometimes work in a pinch
Click to expand...

19MM and 3/4" sockets pretty much the same and interchangeable.

I think '"worn" 3/4" socket would be pretty loose on an 18MM nut or bolt head.
 
18 smaller than 19. Not being smart. 3/4
way to sloppy. 11/16 too small. 17mm too
small. 19mm too big. On the steering
gearbox and not much room because its
right next to the return line.
 
Jim i need 18mm. Dont know where all this 19mm stuff is coming from. 3/4 way too loose. 17 too tight. 19 way loose.
 
2 different older craftsman sets, 2 china sets and one mac set. No 18. I know i can buy one, i just cant believe i dont have one !
 
Humm , my Craftsman Metric set have the 18 wrench and also sockets , but i got them a long time ago . Had to work on a jap. tractor and the only Metric tools i owned at the time was one crest wrench that said it was suck and such Millimeters and a pipe wrench that i could make work on metric . So to do the job it was a fast trip to sears and i bought the comb. wrench set up to like 34 MM and the box wrench set up to the same and shallow well and deel in 1/4 thru 1/2 along with metric universal in 1/4 and 3/8th just to work on one jap tractor . Now that i have newer stuff they get used more . But like i said i bought these 25-30 years ago and they were still made in the USA . I had to modified my one box metric to work on a 2.7 Chrysler engine because i was to lazy to tear the top half of the engine off to get to one stinking bolt so i did some heating bending and tweaking and turned a 4.7 hour job into a two beer job . BUT i wanted to replace that one wrench i modified i had to look real hard because they stopped making the box wrenches and after stopping at all the Sears store i came across i found one and it was the only one they had left.
 
(quoted from post at 15:09:00 09/04/19) Jim i need 18mm. Dont know where all this 19mm stuff is coming from. 3/4 way too loose. 17 too tight. 19 way loose.
Click to expand...

"Dont know where all this 19mm stuff is coming from."

300jk, if you would follow this thread in chronological order with quoting on "modern view" you would see that I was replying to MSM and explaining that a 19MM, not to mention a "worn" 10MM would be too loose.

The thread order in "classic" makes absolutely NO sense.
 
Thsnk you. You kinda understand where I'm coming from. I need one wrench to continue. Dont have it. I do have an 18mm impact socket. I was thinking of cutting the line and using it but the line in the steering box next to it is too close for a thick walled socket.
 
I know Jim and thanks ! Guess i need to expand the tool inventory ! Didnt mean to sound nasty.
 
The other day the step son was working on his Toyota pick up and needed an odd ball metric wrench/socket. I told him to go an grab a SAE 6 point socket close to that size and it worked just fine.
 
My Craftsman set Made in the USA has 18 MM and a cheap set of ACE Hardware wrenches Made in Taiwan also has 18 MM. The only time I remember using 18 MM was on Ford shock absorbers.
 
Had to have one once in emergency situation. Grabbed an 11/16 cheap wrench and used 4" hand grinder to open up open end 20 thousandths. Got the job done and tossed wrench in modified box.
 
I think that's the only time I've ever used one. And I had to go out and buy one.

Replaced the rear shocks on an F-350 dually for one of my wife's brothers.
 
we use 16 and 18 mm at the body shop quite a bit. very common on suspension and brake parts. another real oddball is the 5.5 mm socket. common on ford suv body and trim panels.
 
My metric combination set from the eighties doesn't have an 18 or a 12. Better have both if you're going to do the brakes on a GM vehicle.

Another oddball is the 14mm. I have a a 14 mm socket I used for the crank nut on a Japanese bicycle from the seventies, but I've rarely used it since then.
 
Well a few year ago I had the same problem. I bought an 18mm combination wrench from NAPA. The NAPA number is NDM 58. I also have an 18MM deep impact socket. It is a Snap-On but I can not make out the complete number.
 
My 18MMs get used a lot, would not to be with out them!
cvphoto35660.jpg
 
I got 18s pretty much covered plus another 3 or 4 out in another tool box. The little short one in the middle is whittled out of a 9/16 combination wrench to take hoses off steering racks once the nut is busted loose in tight spots to speed things up.
cvphoto35658.jpg


cvphoto35659.jpg
 
That's one thing that's frustrating about the metric system, different manufacturers use different size bolt heads/nuts, so that's why you need every size. American industry used to be that way, I have a set of taps/dies that had a 1/2 x 12 TPI, and I have worked on equipment that used it. I had to buy an 18mm deep well last year the take the spark plugs out of my motorcycle.
 
18mm wrenches and sockets are available at Farm & Fleet. Sockets in DeWalt and Duracraft, wrenches in Duracraft and Gear Wrench. Any place that carries DeWalt or Gear Wrench should have them.
 
In a bind, I have used a wrench that is a little (or more) too big, then found a flat washer that would take up enough of the slack to get the job done. Also works with a 6 point socket if you can get it to stay put long enough. But also, I am a pack rat and I have never in my life thrown away a washer, so I have plenty of stock to choose from!!
 
Your local pawn shop is your friend. Here a good wrench will set you back maybe $5.00 I have bought two sets of Stanley combination wrenches for 15.00 for one, and 20.00 for the other set. metric and standard.
 
(quoted from post at 04:08:23 09/05/19) we use 16 and 18 mm at the body shop quite a bit. very common on suspension and brake parts. another real oddball is the 5.5 mm socket. common on ford suv body and trim panels.
Click to expand...

Whut he said they have became common on brake caliper mounts in the last 10 years... Use to never need one but now you do...

Years ago most bargain wrench sets did not have 18MM, 16MM, 11MM and maybe a 9MM that's why they were a bargain...
 
(quoted from post at 04:41:16 09/05/19) My metric combination set from the eighties doesn't have an 18 or a 12. Better have both if you're going to do the brakes on a GM vehicle.

Another oddball is the 14mm. I have a a 14 mm socket I used for the crank nut on a Japanese bicycle from the seventies, but I've rarely used it since then.
Click to expand...

14 is common as it gets on J.A.P./asin stuff...

J A P use 8,10,12,14,17MM some 19MM common as ell

Domestic 8,10, (Ford 11),13,15,18,19,21MM I guess domestic filled the gaps in...

J A P remember they like even numbers
Domestic they like odd numbers...
 
18 mm must be getting popular. I have read several articles lately of people needing them. My neighbor has a JD X320 that has 18mm blade bolts. I bought a nice set of short 1/2 inch drive metric impact sockets from Harbor Freight that included 18mm since I service his mower. Used it the other day and couldn?t find socket when I went to put up the tools and then I realized the socket must have stayed on the blade bolt and now it?s in the twilight zone. I will probably have to pay as much for one socket as I did for the set if I go to an auto parts store. Oh well....
 
Wife's Caravan has a boatload of bolts and nuts on the suspension parts with 18mm hex size. I ended up getting a couple 18mm combination wrenches and a 1/2" drive 18mm socket at NAPA for sort of reasonable cost. Only vehicle I have ever worked on that used 18mm.
 
(quoted from post at 18:23:01 09/04/19) Well for US OLD FARTS that have been on here for many moons we like the classic and [b:04a37d8d5a]are not into the MODERN way of things .[/b:04a37d8d5a]
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How did you ever learn to use a computer or smart phone, etc. in order to use the internet? They're pretty modern.
 
I remember going to Sears on Sunday in the middle of a brake job to buy an 18 mm socket to continue the work. Not one in my sets.
 
I had to change struts in a Dodge Neon a while back and needed an 18mm. After much searching, I finally dug one out of my spare socket collection. Since then I've bought three or four 18mm when I've found them at swap meets. It does seem strange they seem to be rather scarce.
 
If you look up Tekton brand tools they brag most of their sets are nonskip. They seem to get good reviews. I'm going to try a set of their impact sockets out soon. They're an American company but most of the tools are from Taiwan I believe.
 
(quoted from post at 08:04:11 09/05/19) If you look up Tekton brand tools they brag most of their sets are nonskip. They seem to get good reviews. I'm going to try a set of their impact sockets out soon. They're an American company but most of the tools are from Taiwan I believe.
Click to expand...

I bought a Crescent-brand 1/2" ratchet a while back, but when it arrived it wasn't like the pictures showed. There were holes at the forward/reverse selector that I could see the gears inside. Much too easy for dirt and water to get in, in my opinion.

I bought a Tekton instead. I have Wright and Craftsman ratchets, and a couple of Snap-On, but this Tekton....NICE TOOL!
https://www.amazon.com/gp/product/B00KLY1C5M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
 
(quoted from post at 17:46:52 09/04/19) I didn't know those were available in metric.
Click to expand...

Many of the newest ones we have at work list the size in SAE on one side, flip it over and the Metric is on the other, usually referring to the length of the tool, not the jaw capacity.

I for one, would not have minded if the US would have adopted the Metric system wholeheartedly back around 1976. I still have tractors older than that, so some SAE would be needed, but the last 43 years have flown by, and I could have saved some of that time walking back to get the other size wrench or driving back to the hardware store for the other thread pitch, etc.
 
Ford has used that size since the mid nineties. Had to search a bit at first, but now, tool trucks, Napa, Nat Bushing etc along with the Box Stores like Menards, Fleet Farm, Runnings etc all have them, at least in 1/2 and 2/8 sizes. Wrenches appear common.
 
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