Gardner Bender 10-2H2 Hex-Lok Twist-On Wire Connectors, 14-6 AWG, Electrical Wire Nut, 50 pk, Grey LONG LASTING DESIGN: Hex head design allows for automatic or manual installation without stress distortion and square wire spring grabs and holds wires for secure connections LONG LASTING DESIGN: Streamlined design for compact installations and long skirt covers stripped wires TEMPERATURE RATING: 600V max in building wire and at 1000V max in lighting, fixtures/luminaries and signs COPPER TO COPPER connections only WIRE RANGE: 3 #14 (min) and 1 #6 with 1 #8 (max) UL LISTED: Canadian and U.S. requirements (connections rated at 600V Max for building wiring and rated at 1000V Max in lighting fixtures/luminaries and signs) WIRE RANGE: 3 #14 (Min) to 1 #6 with 1 #8 (Max) Hex head design allows automatic or manual installation without stress whitening or distortion Use 7/16-Inch socket Multi-range copper to copper connector covers 95-Percent of everyday applications Streamlined design for compact installations Square wire spring grabs and holds wires for secure connections