98vtec

So my vendor is telling me it would be cheaper and faster to find a set of nuts on my own. I have the AEBS nuts and apparently when i first installed and torqued them, i used the wrong socket and rounded the 12points.

I now know that the AEBS nuts are 1/2". I called Don, he said the ARP's he has used were also 1/2".

However, I called ARP and they said the nuts are a 12x1.25mm and use a 14mm socket size.

I'm at a loss here on what to order....and i need to order them and have them here before my head gasket arrives.

Thanks.

DonF

All the ARP and GE head stud nuts I have here are 1/2 or 13mm 12 points for the socket. What did Race Engineering say? They should have had a set of nuts.
I think they are 11mmX1.25 not 12mm studs.

98vtec

i guess they werent open.

SP GARAGE

iTrader: (1)

i have a set of h22 AEBS nuts here and i use a 1/2" 12point socket. i also have a h22 arp head studs here and it uses a 9/16" or 14mm socket

98vtec

do they have the same thread pitch and ID?

ironcheftony

these are b-series vtec headstuds set of ARP and AEBS
nut thread is m11x1.25
either nuts will work on either stud
these nuts use a 13mm 12pt socket, im sure a 1/2" 12pt is close to a 13mm thats why some people say 1/2" 12pt socket


ARP on left AEBS on right side view

ARP on left AEBS on right thread view

ARP on bottom AEBS on top, ARP stud

ARP on bottom AEBS on top, showing ARP stud

threads on smoothlY!
the bottom of the nuts are visually virtually the same, both flat faced

the ARP nut appears rounded but that is not done by me, just received this way
this could be the use of the wrong size socket

98vtec

thanks a lot man! that really helps. Finally i can order them.

98vtec

ok im looking and i cannot find an arp nut with 11x1.25 thread size. Ive looked in Jegs and Summit.

http://www.jegs.com/p/ARP/ARP-Replac...52063/10002/-1
http://store.summitracing.com/egnsea...0&NeXID=100740

ZoRG

M11 doesn't come in 1.25mm unless it's custom, which is unlikely it's probably M12 x 1.25 or M11 x 1.

98vtec

well arp said it was 12x1.25 so i guess i will just trust them lol

ZoRG

Edit: oops, not m12.

DonF

Guess i need to toss all my mikes and vernier calipers away as they are all fooocked up and measure 11mm. I guess i will also toss my 2 time-sert kits for honda's away also. They are for 11X 1.5 threads. Damn i have to recall all those repairs, and blocks with 11mm ARP head studs. 10 + years down the drain.

dlaub25

iTrader: (1)

I think he's right. I got curious and had a set close by...





.431 give or take. Thats about 10.95mm These are for a B18C. That is what you guys are talking about right.

Edit: I just read the thread size on the ARP nut itself. It says 7/16-20.

98vtec

well whatever, i ordered the 12x1.25mm from summit. If they are wrong, i will return them for the next size failure.

this is ****ing ridiculous

punkrockkiel

why dont you call ARP and order directly from them?? i might be wrong but the threads from the studs that go into the block are different from the threads the nuts go onto...thats how it is for other cars....

stumpyf4

Correct, they don't thread in upside down.

To the OP:
Find someone with a thread pitch gauge (or buy one at the hardware store), measure the stud diameter and presto you have the specs for the nut you need.

ZoRG

Haha walked right into that one... oops, sorry.

98vtec

i did, i explained the situation to them and they said 12x1.25. Show me anywhere where they make and advertise one of their nuts as 11x1.5 or 11x1.25

98vtec

it would have also helped if aebs had a contact number instead of an email address that doesnt even work.

98vtec

ok well i got the nuts today. I called arp again to reassure myself. I gave them the part number of the package and they said it is the correct nut for their stud - 12mmx1.25

Natural Aspirations

Do they fit? It is possible that there is a STD thread on that end as dlaub25 mentioned.

98vtec

i wont find out til next week when the new head goes on

DonF

I forgot you are doing H22 studs and you did not mention that, they may be 12mm. Bseries are 11 mm, D series 10mm. ARP and AEBS should be the same.