IDEAL® WIRE-NUT® 30-071 71B Flame-Retardant Wire Connector, Fixed/Square Wire Spring, 22 to 16 AWG Wire, Aluminum/Copper Wire, Polypropylene/Steel

With a fixed, square-wire spring and a positive grip shell, the WIRE-NUT® is perfect to twist-on with fingers for a secure connection that will last. The refined wire range makes it the best choice for fine stranded wire applications. The WIRE-NUT® also features a tough, flame-retardant thermoplastic shell that withstands environmental extremes and is reusable for easy circuit changes and addition.