Hey Guys & Girls,

Anybody know what thread size the nyloc nut is at the rear of the rear spindle? I ‘am rebuilding an EK and want new hardware to replace the old rusted ones.

Also the 15mm torx bolts that secure the spindle assembly to the trailing arm (think they are M10 X 1.25)?

Thanks in advance.

 

I never filled that one in on my spreadsheet dammit. Pretty sure it's M14x1.25 EDIT 4/23/2021 - Confirmed by @mattkosem to be M16x1.5. The four Torx are M10x1.25.

 

Man that's a nice lookin trailing arm . Thanks

Is that a new OEM arm?

 

Thanks. Refurbished by me. Stripped, blasted, powdercoated. Hardware was stripped and replated. Red marks are for checking for bolt backout and blue means the fastener is loctited (since Nyloc nuts are technically single use). I've been going a little overboard on this one, it's possible that I'll never actually drive it at the rate I'm going.

 

Cool, doing the same myself. Do you recommend the powercoating is a good job yea? Is the paint POR15?

Where did you get the new hardware, I cant seem to get them anywhere. Local shops here don't have these with the 1.25 pitch? Are you in Cali?, I'am in Uk but could maybe still buy them from the states!


''I've been going a little overboard on this one, it's possible that I'll never actually drive it at the rate I'm going.'' -LOL Same here, don't know where to stop

 

I hit the easy button and did powdercoat instead of POR15/paint. Stripping/blasting is the expensive/hard part if you don't have the right equipment. I spent a few hundred bucks doing the entire suspension and some other random parts, but I just dropped it off and picked it up when it was done. Powder coating is ideal for this application anyways, IMO.


Hardware was refurbished. I pulled a ton of it off of the car, catalogued and triaged it all and replaced what needed to be replaced from the dealer. Then sent about 60-70lbs worth off to be stripped and zinc plated. Cost was a couple hundred for the replating, replacement would have cost nearly $1000.
:

 

OOOHH nice shiny bolts lol.
I got OEM bolts as some of them were rounded/REALLY rusted but will prob just get the rest zinc plated as their not too bad.

Do you have a build thread/pics for this yoke?
Thanks for the info!

 

Typically Honda uses a 1.5 thread pitch on their 14mm hardware. To verify the pitch try it on a front subframe bolt. I know those are 14x1.5

 

I replaced those torx with 17mm stainless bolts that are slightly longer as well. A 17mm thin wall socket fits in the holes just enough. Props on that bolt refinishing! I have a huge bucket of bolts I stripped from a car, literally every nut and bolt for a 96 Civic... and I find myself searching for bolts because I've used them for so many other projects lol.

 

Man, the internet has all the answers! I am struggling to find a M14x1.25 flange nyloc nut for the diameter of the spindle mount though. Also I'm not sure how to tell what diameter of bolt a nut will accept, since I think M14x1.25 is the thread pitch and many size nuts could have that thread pitch but not be big enough for the spindle mount. I wonder if these nuts are used on any other Honda/Acura vehicles? Mine are toast and I'd like to get new if possible. Definitely not listed for 92-00 civic/94-01 integra as they only sold the rear trailing arm and spindle as a unit.

BTW- these RTA look amazing and I'm stealing the markings idea to make sure the bolts don't back out.

 

Sorry for the necro bump, but has anyone ever determined what the thread on that 24mm nut is? I can confirm that it's definitely not M14xAnything. I've got M14x1.25 and M14x1.5 bolts here and they slide right through without touching the threads of the nut at all.

My caliper on the threads says 15.89mm. An M14 bolt is 13.89. Based on this, I assume it must be M16...but I have no idea how to measure the pitch.

Edit: Well, Google search suggests that it won't be too hard to determine the thread pitch... https://www.albanycountyfasteners.co...-per-inch-tpi/

I'll give it a go later and share what I find. I've only managed to find 2 threads about this nut, and both wrongly call it out to be M14.

 

As far as I can tell it's M16-1.5.

The nut is 17.2mm tall, flare is 28mm, and flat to flat measurement is (as we already know) 24mm.

The indent in the arm looks like it could accommodate as much as a 30mm flange.

--Matt

 

M16 1.25 or 1.5 makes sense for what you measured - It's definitely nothing coarser than that. I could have sworn I measured M14 but it's been yeeeears now... Perhaps why it's so hard to find a replacement nut. I have another set of spindles/arms I snatched from the junkyard for my daily sitting in my garage waiting for me to work on, if I can get hands on them I'll measure for you.

You need one of these in your life btw, included in most tap/die sets but I recommend keeping a separate one because you'll use it by itself regularly:


https://www.lowes.com/pd/IRWIN-Metri...uge/1003087516

 

The HELP! section at my local auto parts store had only drain plugs in M16x1.5, but I grabbed one and can confirm that to be the right thread!

 

Nice work! I already edited my original response with credit to you. Thanks.

 

I've never had such a hard time finding fasteners as I have with this stupid nut. I thought 30mm would fit, but it actually won't. There aren't any flange nuts out there in trustworthy materials with a flange that size. I can find workable non-flange nyloc nuts that work, like this one: https://www.mcmaster.com/94645A116/

What I can't find is a small OD (DIN433 size) washer to go under it. 🤦

 

Try Belmetric.com:

https://www.belmetric.com/fine-c-3_7...inc-p-166.html



https://www.belmetric.com/small-oute...nc-p-7531.html

 

I've been up and down that site and it's kin for weeks. I'm not so hot to class 8 nuts or hv140 washers in a critical spot like this. Really want 10.9 and hv300.

 

10.9 is way overrated for the job. But I can get behind overdoing things.

 

You're probably right. Maybe I'll just settle for one of the lower hardness washers. McMaster has some comparable ones too (and is just down the road from me) as does Fastenal.

Closest I've found, after honestly hours and hours of looking, is this guy (which is a bit thick TBQH):
https://www.mscdirect.com/product/details/71925986

--Matt

 

Finally got this all back together!







Thanks @Chrisfrom1986 for swapping spindles with me! Just gotta get the brake cables and hoses sorted and I should be good to go!

I ultimately went with this nut/washer combo from Belmetric:
NNH16X1.5CLZ
WF16X28CLZ

And these from McMaster:
95735A616

--Matt

 

Clean work. Well done.

 

At how many lbf-ft Did you torque the big nut behind and the fours small bolts ?

 

I used these specs: https://honda-tech.com/forums/honda-.../#post18123688

--Matt

 

perfect thanks you so much