The 3M Scotchlok tap connector is sold 1000 per case and is another quality product from 3M. Supported wire size is 18 AWG to 14 AWG. The maximum outside diameter of the insulation this tap connector can work with is 0.15 in. Among all the other aspects of this product, it offers the following resistant properties: chemical-resistant. This tap connector meets the following standards: CSA LR15503.