Nut Identification

[PaulRobertson]

Hi
I am looking for a M8 nut that has half a hex body (about 13mm) and half a small diameter (11mm ish) round.
Can anyone tell me 1. what is this type of nut called, 2. who sells/makes them.
Thanks

 

[NickE]

Acorn nut. unless the round portion has a nylon insert, then its a nylock nut.

 

[PaulRobertson]

Thanks NickE, I should have said cylinder instead of round with the treaded hole being thru.
Below is an asci "cross section"
___ ___
| | | | <Hex 13 mm ish
| | | |
| | | | <cylinder 11 mm ish
| | | |
-- --
^
M8 X 1 thru

 

[NickE]

is it a type of insert nut? IE: the 11mm portion goes into a tight fit hole, the hex is used for tightening. Does the thread change at any point in the length. I know Ive seen nuts like this before, maybe in electronics for standing off of PC boards.

Hmmmmm..... I'll sleep on this one an catch you back tomorrow....

 

[PaulRobertson]

This is to bolt a product that we make to a Product/stud we do not make. The studs use to be longer and we had the room to use a standard nut. Now we can only engage 2-3 threads so we need this design to engage a reasonable number of threads. I can change the OD of the piece that the nut goes through. I am trying to avoid designing and having this part made.
Cheers

 

[unclesyd]

I think you best bet would be to get a M8 coupling nut of the appropriate length and turn down one end to your desired dia. You are going to have a very thin wall nut that will not take much load.
As stated I’ve seen this type nut in smaller diameters mostly without hex heads. I have seen a very similar nut made, but with a much longer column. It was more like a sex bolt and nut.
I’ll still ask around to see if someone has this design on the shelf.

How many do you need?

What material do you need?

 

[PaulRobertson]

Usage is only about 750 a year, material steel either stainless or clear zinc plated.