Locking Fork Terminal, Narrow Tongue, Vinyl Insulated, 22 - 18 American Wire Gauge (AWG), No. 10 Stud Size, Funnel Entry. Locks in place for secure connection. Fork design provides for fast and easy installation, without the need to remove fastener. Insulation support helps to prevent wire damage in bending applications. Internal barrel serrations assure good wire contact and maximum tensile strength. UL Flammability UL 94V-0, maximum insulation temperature 221 degrees Fahrenheit (105 degrees Celsius). Rated up 600 Volts. Standard Package.