Coin blanks are punched out of a sheet of metal, like a hole-punch punches holes in paper. They are always round metal discs, with no sprues or odd corners still attached.
Whatever these things are, they aren't numismatic. Agree they are probably electrical.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis