A fluid coupling may comprise a first assembly, a second assembly and a retainer. The first assembly may include first ratchet teeth and a body with external threads. The second assembly may include second ratchet teeth and a nut with internal threads. The second ratchet teeth may be configured to engage the first ratchet teeth. The internal threads may be configured to engage the external threads. The retainer may include at least one floating lobe configured to be positioned between the external and internal threads. At least one floating lobe may include first and second lobes, which may have a semi-circular structure and may be configured in a ring configuration. In embodiments, the second assembly includes a valve sleeve; a seal is disposed between the body and valve sleeve; and, upon connection, a sealing surface angle is provided between a portion of the body and a portion of the sleeve.