Re: Nylon
Ah, Nylon, and a memory triggered. No names will be mentioned.
Waaaay back in the early '80's, I think, my employer won a contract for a safety related system on a new bike power station.
Customer had specified the whole thing very tightly - PO 3000 relays and to be assembled using a prescribed list of bits, which included Nylon pushrods.
Our guys pointed out that Nylon wasn't appropriate, as it was hygroscopic and with the multiple contacts specified, there was a good chance that the relays would fail. Fast.
Customer insisted, so we went ahead.
Guess what? Relays fell over like journalists after the pub. All the pushrods were changed out for PTFE ones, I believe at the clients expense.