8501NR plug in relay sockets are designed for the proper wiring of 8501K plug in relays. This socket can be mount on 35mm DIN rail or can be mounted directly to a panel. The 8501KPR13 and 8501KPDR13 relays and 9050JCK timers will plug into this relay socket which is designed for 11 tubular pins. The socket terminals have pressure wire clamps for a good secure connection. To make wiring easier the terminals are not stacked. 8501NR plug in relay sockets are UL component recognized and CSA certified.