The 54012-1 is a Circular Connector Cable Seal made of black PO (polyolefin)/nylon (polyamide). It is applied to cable. TE Connectivity's Circular Plastic Connectors (CPC) product line offers a rugged, reliable connector system suitable for a wide range of applications. The circular configuration provides designers with an efficient use of board space. Mounting options include panel mount, free-hanging, and wire-to-board. Applications Industrial