I usually name my PARTs so that the prefix contains a portion of the top assembly number, and the postfix contains the part number. usually separated by an underscore or dash:
"TOPASSEMBLY_ORINGPARTNUMBER_01"
"TOPASSEMBLY_COUPLINGNUT"
The reason for this is so that when doing a search, you can easily see what the PART is used on, and it makes each one unique. The same o-ring might be used multiple times in the same assy, but each has different geometry. The DRAWING I will name only "TOPASSEMBLY"
I have seen others make their o-ring "variable" so that it will conform to each different groove dia.. Then you will only have one solid model instead of thousands.
I choose to leave the o-ring over-lapping the mating surfaces. Similar to omitting a helical thread for cosmetic purposes.
Once you enter the parts into your file_management_system (we use intralink) only rename them INSIDE the system, and not from the workspace. Otherwiseassemblies crash, stuff wont check-in, etc. It gets very hard to sort it all out later. Perhaps windchill is similar?
Good luck,
Dan