Nylon lock nuts...OK to use underwater?
Nylon lock nuts...OK to use underwater?
(OP)
I would like to suggest changing from a slotted type locknut to a "nylok" type because of extensive galling we have seen in some applications. Both the nut and threads were stainless steel. The application involves the chamber where the fastener is located being flooded with hot, dirty water, then drained on a periodic basis. The thread is a large size. I am concerned that the nylon may absorb water over time and the lock nut will lose tension. Does anyone have prior experience in this area.





RE: Nylon lock nuts...OK to use underwater?
There are available lock nuts that have an embedded "circlip" where the nylon usually is in a "Nylok" nut. The circlip is flat but when installed, it is forced to take on a helical shape as it follows the valley of the thread. These can handle a wide variety of environments. I have seen them under the name of "Glenloch". A search for Glenloch on the net shows an Australian company (www.jglen.com) only. I've only seen these in stainless steel and a common use for them is automotive exhaust systems.
I would suggest talking to a fastener specialist and see if they can locate any for you.
RE: Nylon lock nuts...OK to use underwater?
Only problem I have encountered with Nylok type nuts is if they are reused too many times. Then their locking feature becomes ineffective.
bcd
RE: Nylon lock nuts...OK to use underwater?
RE: Nylon lock nuts...OK to use underwater?
RE: Nylon lock nuts...OK to use underwater?
Problems encountered - it's a little messy on assembly and can be difficult to dissassemble. I am not sure what it's temperature limitations are.
I would be interested to know what anyone has to say about this method.