3M(TM) Electrical Spring Connectors 312, Yellow, 500 per jug, 10000 per case 5-7#22, 3-6#20, 2-6#18, 2-6#16, 1-4#14, 1-3#12 AWG. Designed for speed and efficiency, these connectors spin-on quickly and tighten-down easily. They're engineered for easy back-off, too. The live inner spring action delivers uniform holding power.