An electrical pass-through assembly for traversing a structure includes a sleeve defining a fixed end, a locked end, a passage extending between the fixed end and the locked end, a mating feature disposed on the fixed end, and a locking feature disposed on the locked end. The electrical pass-through assembly also includes a fitting configured to attach the structure. The fitting includes an inner surface defining an opening shaped to receive the fixed end of the sleeve. A corresponding mating feature is disposed along the inner surface of the fitting and engages with the mating feature disposed at the fixed end of the sleeve to prevent relative rotation between the fitting and the sleeve. The electrical pass-through assembly also includes a locking retainer including a corresponding locking feature that securely engages with the locking feature disposed at the locked end of the sleeve.