Which type of plug supplies a connection between flexible cords and receptacles?

The type of plug that supplies a connection between flexible cords and receptacles is known as an attachment plug, also referred to as a plug cap. This kind of plug is designed specifically to connect portable or flexible wiring to an electrical supply through a receptacle.

Attachment plugs come in various configurations to ensure compatibility with receptacles, including different voltage and current ratings. They are commonly used in applications where flexibility is needed, such as connecting power tools, appliances, or lighting fixtures that require mobility.

The other options, while they may serve unique functions in electrical systems, do not specifically refer to the general connection between flexible cords and receptacles in the same manner as an attachment plug does. This makes the attachment plug the correct choice for the question asked.