6 METAL FASTENERS, NAMELY RING LOCKED INSERTS, RING LOCKED STUDS, LOCK RINGS, PRESS-LOCK NUTS AND BOLTS, CLINCH NUTS AND BOLTS, WASHER SEATS, THIN WALL INSERTS, U-TAP INSERTS, SELF-TAP INSERTS, SPARK PLUG INSERTS, SELF-DRILLING STUDS AND BOLTS, AND ONE PIECE INSERTS; AND FLUID FITTINGS, NAMELY FLUID ADAPTERS, FLUID PLUGS, FLUID INSERTS, AND LOCK RINGS THEREFOR