Abstract: A coupling assembly includes: a first coupling device including: an insert configured to be coupled to a source or a destination of a fluid; a seal coupled to the insert to create a seal with a mating seal; and a sleeve coupled to the insert, the sleeve including a locking structure; and a second coupling device that is substantially identical to the first coupling device. The first coupling device is coupled to the second coupling device by rotating the second coupling device relative to the first coupling device and moving the second coupling device axially towards the first coupling device to allow the locking structure on the first coupling device to engage the locking structure on the second coupling device and seals of the first and second coupling devices to form an axial seal so that fluid can flow from the line and through the first and second coupling devices.