IDEAL® Twister® Pro General Purpose Winged Twist-On Wire Connector, Series: 344, 22 to 8 AWG Wire, 600 VAC, 105 deg C, Polypropylene Shell, Red/Tan, 1-1/4 in H x 15/16 in W, Jar of 500
Twister® Pro wire connectors have an expanding square-wing spring that provides a secure connection every time.