Ancor Nylon Multi-Stack Connectors are constructed from durable nylon and insulated for extra protection against sunlight, gasoline, oil, and chemicals. The double-crimp, funnel-entry design guides the wire into position and prevents strand turn-back. The crimp ridge better positions the crimp tool to prevent miscrimps. Brass sleeve crimps on the wire insulate provide fatigue and strain relief. .250 (6.4mm) tab size. UL 310.