GB's WingGard twist-on wire connectors offer unsurpassed quality and durability in a high-leverage, easy-on, wing-type design. These hardworking connectors offer a wide range of connection options essentially ensuring that one size can do the job of multiple standard connectors. The swept wings provide added turning torque and reduce the strain of multiple applications. The thermoplastic shell provides strength and resistance to chemicals while a long skirt prevents exposure of bare wire. The zinc-plated square wire-spring inside instantly adjusts to the shape and size of the splice upon insertion ensuring a long-lasting connection that resists corrosion and exceeds UL standards for dielectric strength and wire pullout force. Unsurpassed quality and durability in a high-leverage, easy-on wing-type designEasy-on, easy-off without toolsExpandable square-wire spring instantly adjusts to the shape and size of the splice, then bites down to thread onto the wires without ratcheting and creates a strong, vibration-resistant connectionNo pre-twisting or tools are necessaryTough thermoplastic shell shields against environmental extremesFlame-retardant, non-porous, and non-corrosive shell resists surface cracking and chemical actionTemperature rating: 105 degrees C, 221 degrees FSuperior flash-over protection, high dielectric shell features deep skirt design to prevent exposure of bare wireButtress threads screw into wire insulation