Sherco Automotive & Marine Supplies Nylon-insulated wire connectors are terminals that are used to connect, mate, or terminate electrical wire. The Nylon material acts as an economic insulation for professional electrical applications. Nylon-insulated wire terminals are great for automotive & marine vehicles, and in other applications that utilize wire to transfer electrical current. - Nylon-insulated wire connectors are the most economical insulated terminal available. - The sleeve is securely fastened to the barrel. - The Opening for our Nylon Connectors have a flared entry for easy wire insertion. - Standard Industry color-coding indicates wire range. - Rated 600 volts maximum, building wire; 1000 volts maximum, signs and fixtures. - Temperature rating: 105 C (221 F).