I don't know what to call it.  You know, the one that threads onto the spindle after the outer bearing and the washer, and before the retaining cap and cotter pin.

I'm mystified how I lost it and have never looked for a thing more thoroughly in my life.  I've now thrown in the towel and find that this happens to be an item that can't be found anywhere.  So I'm now to the point of asking the Z community if anyone has one or knows where to get one.  Please PM me if you have one available.  I will be eternally grateful.

Thanks,

I don't have one but I think it's called a castle nut? You should be able to find one at local auto parts in the HELP section for brake parts. Probably a common thread and the height wouldn't have to be too exact. Good luck.

 

Edited May 22, 20178 yr by siteunseen

Does kinda look like a castle!

Minus the moat.

Edited May 22, 20178 yr by siteunseen

I remember it being referred as a castle nut too. Interesting that Z Car Depot sells the newer style wheel bearing nuts that use a castle washer and a plain nut for all years.

Yeah that's where I'd want some insurance that nut wouldn't back off. 

Interesting for sure.

http://www.ebay.com/itm/70-74-DATSUN-240Z-260Z-FRONT-SPINDLE-CASTLE-NUT-WITH-WASHER-NICE-OEM-PARTS/222114221446

Single castle nut from same seller: http://www.ebay.com/itm/70-74-DATSUN-240Z-260Z-FRONT-SPINDLE-CASTLE-NUT-WITH-WASHER-NICE-OEM-PARTS-/221864836376

Thanks for the replies, men.  This one isn't a castle nut, but a standard nut which is thinner than usual.  Then a cap fits over the top of it and the cotter pin engages the cap.  Apparently this was only on the 280.  Although you do have me wondering why the 240 castle nut wouldn't work in it's place.

Here's what the 280 has:

http://www.ebay.com/itm/74-78-DATSUN-280Z-280ZX-FRONT-SPINDLE-CASTLE-NUTS-WITH-WASHERS-NICE-OEM-PARTS-/222423964707?hash=item33c9805c23:g:rscAAOSwxg5XybHE&vxp=mtr

Thanks for pointing me to the ebay source.  I'll have to get in the habit of checking there.  $25 for one nut is a tough pill to swallow.  Oh well, clumsy, stupid people that lose important parts deserve what they get I suppose.

I could swear that I ordered some of the caps that go over the nuts. I'll have to check my hardware supply if I can remember it.

I know the one you mean. It needs a castle-like cover that acts as the lock for the cauter/cotter/cotur pin.   I can always scrouge up stuff like this is you can't find one elsewhere. Let me know at z240@shaw.c

Edited May 23, 20178 yr by zKars

CASTLELATED I believe is the correct term. We used the quite often in aircraft manufacturing. There is a cap the goes on before the cotter pin. I believe it is to prevent chaffing of the pin itself if the nut unwinds a bit.