Cosa clutch nut

[ArmandTanzarian]

Hi all,

Should a 19mm cosa clutch nut have a locking washer underneath it?

[bazman]

some nuts came with a flange built into them , and some came with a separate wavy washer.

[crispin]

My nut came without a washer and has a serrated underside.

[goldeneye]

I use a tiny bit of locktite thread lock on these, not too much , or you can struggle to get the clutch off in the future. just a drop on the threads.