M3 Metal lock nuts

[Desmo]

I'm chasing some M3 metal lock nuts for use in a high vibration, high temp area (muffler/exhaust) and hence can't use nyloc nuts or loctite.
Any suggestions?

[darkfibre]

Use a second nut to lock it?

[henrys]

Coventrys Fasteners (used be Sweetman's)
Searle's Fasteners
I'm going to Covs in O'Connor shortly, you wanna me to get you some? Call me if so, and how many, 0437 314 623

[Fozzy]

Just use 2 normal nuts and lock them together.

[darkfibre]

I would be surprised if Covs have anything other than Nylocs in M3. Worth asking though.

[agrid]

[Screamin TE]

You can purchase something called "platelock" nuts. Or conelock. Platelock are similar to a nyloc except they have a spiral metal disc in place of the nylon. Conelock are crimped over at the top and the last few threads squeeze onto the thread.

[TRX]

Nordlock washers & bolts

http://www.nord-lock.com/default.asp?url=2.16.37


Tension makes the bolt self-locking
The key is the difference in angles. Since the cam angle " α " is larger than the thread pitch " β ", the pair of washers expand more than the corresponding pitch of the thread. NORD-LOCK washers positively lock the fastener in a joint which is subjected to extreme vibration or dynamic loads.

[milesiles]

Just use 2 normal nuts and lock them together.

^^^easy option.

Or Cat/Westrac do a lock nut and a high temp range of nuts, not sure about M3 though.

[g0zer]

+1 for nordlock

we use them to hold large scale mining (vibrating) screens together.

[agrid]

You've gotta love the Germans, these look really nice. Never seen them before.

http://www.sftengineering.com/fh_pdf...t_Englisch.pdf

[Rosco327]

Theres a place in Balcatta called West Coast Fasteners I use