The present disclosure provides a fastener for supporting and connecting two electric connectors. The fastener comprises a support portion provided with a support surface on a top portion thereof, a connecting hole penetrating the support surface and extending into the support portion, and a pair of clamping shoulders respectively arranged on opposing first and second sides of the support portion. The pair of clamping shoulders are made of a first elastic material at least at top portions thereof such that, when the fastener is mounted in a receiving slot of a fastener receiving member, the pair of clamping shoulders can be pressed against the fastener receiving member to provide an amount of elastic deformation, which enables the fastener to move a certain distance toward the electric connectors relative to the fastener receiving member when the fastener is connected to the electric connectors.