A friend showed me a weird flanged nut today, still trying to figure out
what it was. Approximately M12 diameter, coarse thread, flanged nut,
think it was used in a Porsche. Starting from the flange side, there
were approximately 5 regular threads, a gap with no threads at all bored
out to the major diameter, and then one complete thread. It looked like
a standard nylon locking nut with the nylon removed and with a thread
instead of the top crimp.

What is it???

"RoyJ" wrote in message
m...
A friend showed me a weird flanged nut today, still trying to figure out
what it was. Approximately M12 diameter, coarse thread, flanged nut, think
it was used in a Porsche. Starting from the flange side, there were
approximately 5 regular threads, a gap with no threads at all bored out to
the major diameter, and then one complete thread. It looked like a standard
nylon locking nut with the nylon removed and with a thread instead of the
top crimp.

What is it???

Those used to be common. It's just a self locking nut, it has been squashed
a bit at the gap so that the threads lock better. The Nylock ones are more
common now.

Steve R.

RoyJ wrote:
A friend showed me a weird flanged nut today, still trying to figure out
what it was. Approximately M12 diameter, coarse thread, flanged nut,
think it was used in a Porsche. Starting from the flange side, there
were approximately 5 regular threads, a gap with no threads at all bored
out to the major diameter, and then one complete thread. It looked like
a standard nylon locking nut with the nylon removed and with a thread
instead of the top crimp.

What is it???

A high temp lock nut. The Nylocks (tm) tend to melt at high temp.
...lew...

Steve R. wrote:
"RoyJ" wrote in message
m...

A friend showed me a weird flanged nut today, still trying to figure out
what it was. Approximately M12 diameter, coarse thread, flanged nut, think
it was used in a Porsche. Starting from the flange side, there were
approximately 5 regular threads, a gap with no threads at all bored out to
the major diameter, and then one complete thread. It looked like a standard
nylon locking nut with the nylon removed and with a thread instead of the
top crimp.

What is it???


Those used to be common. It's just a self locking nut, it has been squashed
a bit at the gap so that the threads lock better. The Nylock ones are more
common now.

Never seen one like that before, but I think Steve is probably right.
The top part will have been plastically distorted a little so that the
threads don't quite match the ones in the main part of the nut. Then
when you wind in the screw, it pushes the threads back towards their
correct position (hopefully elastically). In the process, it creates a
lot of friction. That's the way that the types of all-metal locking nut
I've seen work. The common brands here are Binx, Philidas and Aerotight,
but I'm pretty sure it's not one of those.

How are things looking with those CV joint parts, Roy? I'm still very
happy to mail you the cash for postage.

Best wishes,

Chris

They are a high temp locknut and they are popular in Europe in the auto industry.....be advised they are a one time use nut. If
they are removed, they must be replaced with a new one.
Steve

"RoyJ" wrote in message m...
A friend showed me a weird flanged nut today, still trying to figure out what it was. Approximately M12 diameter, coarse thread,
flanged nut, think it was used in a Porsche. Starting from the flange side, there were approximately 5 regular threads, a gap
with no threads at all bored out to the major diameter, and then one complete thread. It looked like a standard nylon locking nut
with the nylon removed and with a thread instead of the top crimp.

What is it???

About what I figured, just looking for a bit of backup as well as the
theory. Thanks!!!

Steve Lusardi wrote:
They are a high temp locknut and they are popular in Europe in the auto
industry.....be advised they are a one time use nut. If they are
removed, they must be replaced with a new one.
Steve

"RoyJ" wrote in message
m...
A friend showed me a weird flanged nut today, still trying to figure
out what it was. Approximately M12 diameter, coarse thread, flanged
nut, think it was used in a Porsche. Starting from the flange side,
there were approximately 5 regular threads, a gap with no threads at
all bored out to the major diameter, and then one complete thread. It
looked like a standard nylon locking nut with the nylon removed and
with a thread instead of the top crimp.

What is it???