Tight, square-wire spring threads directly onto conductors for fast connections with no slip. Tightens without ratcheting, easily removed for repeat usage on same size combination or larger. Fluted shell surface permits a firm grip for easy finger-tight connections. Thermoplastic shell shields against environmental extremes. Flame-retardant properties resist heat distortion up to 221 degrees Fahrenheit. Superior flash-over protection. High-dielectric shell features deep skirt design to prevent exposure of bare wire. Buttress threads screw into wire insulation. For copper to copper connections only.

WARNING: This product is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.