Patent ID: 8662921

Claim:
A dummy plug to be mounted in a connector that includes a housing formed with terminal accommodating chambers, a one-piece rubber plug including seal holes corresponding to the terminal accommodating chambers and to be mounted in a rear end portion of the housing, and a holder arranged behind the one-piece rubber plug and including through holes corresponding to the seal holes, the dummy plug comprising: a sealing portion to be fit into the seal hole in a liquid-tight manner when the dummy plug is mounted into the connector; two laterally spaced resilient locking pieces extending rearward from a rear end of the sealing portion and being engageable with retaining surfaces of the holder to retain the dummy plug in the connector; and a support connecting the resilient locking pieces to one another at a position rearward of the sealing portion so that single deformation space is provided between the support and the sealing portion and between the resilient locking pieces to permit resilient deformations of the resilient locking pieces toward one another and into the single deformation space.