Non-Insulated Terminals & Connectors: Non-Insulated Ring Terminals (Brazed Seam): Brazed Seams are formed much like a butted seam, except the seam is brazed together with a solder alloy. This provides a better crimp, as the barrel will not open under stress or pull. May be used with solid or stranded wire and can be crimped on any side of the barrel without opening the seam. (Serrated barrel increases pullout strength of hard?to?crimp solid or stranded wire). Non-Insulated Terminals & Connectors are made of 100% pure copper for maximum conductivity with the addition of tin plating for marine applications. Where applicable, serrated barrel offers increased pullout strength of hard-to-crimp solid or stranded wire. Can be crimped or soldered. 600V rating.