A valved insert for insertion into a coupling body is disclosed. In one embodiment, the valved insert includes a housing and an internal valve slidably disposed within an internal passage of the housing. The housing can be configured to have a sidewall defining an internal flow passage, a first open end and a retaining clip recess. The sidewall has a first thickness at the first open end and a second thickness adjacent to the clip recess. In one embodiment, the retaining clip recess has a height that is greater than one half the first thickness and less than or equal to one half the second thickness. The internal valve and the housing can also be provided with corresponding stop surfaces to limit the inward motion of the internal valve into the housing. In one embodiment, the stop surfaces are angled to form ramped surfaces.