Snap Plugs Male/Female Vinyl Insulated-Butted Seam - insulated electrical terminals including vinyl insulated butted-seam snap plugs. We also offer vinyl insulated, nylon insulated and heat shrink insulated ring, spade, butt and several disconnect styles of insulated terminals. Electrical Basics also provides a selection of wiring tools,snap plugs, tap splices, nylon closed end pigtail connectors, push-in connectors and screw-on wire connectors covering a broad range of wire combinations.