Cartridge mount screws - stainless steel

You really don't want any any ferrous metal near your cartridge. It will change the flux pattern of your magnet. Have you tried any of your local hobby supply houses, or Ace Hardware for stainless, brass, plastic or alloy? Here's a link to a mounting kit:(http://www.extremephono.com/Cartridge_kit.htm) You'd better ask what length he supplys as most mounting screws are 3/8" or less. If you have a McMaster-Carr catalog available to you, you could no doubt find some in there as well.

Tshulba i have found brass is the best for anything to do with audio. Try getting brass screws.

Mapleshade also strongly recommends brass.