... exposed or visible.2. No stratification, burr, sripe,pit etc in the side of rivet head3. no liable to oxidization on ... Rivets series electrical contacts is widely used in small and medium-sized current contactor,starter,temperature controller,switches,etc.undercurrent contact devices,microswitches ... .10<10±2≥10±0.2R±2 electric silver contact for switch,temperature controller etc