A swivel assembly including a swivel bolt and housing is disclosed. The swivel bolt may include a first portion, a second portion, and a body portion connecting the first portion and second portion. The second portion may include a transverse channel. The housing may be configured to receive at least a portion of the second portion of the bolt and the housing may include an annular channel operatively aligned with the transverse channel of the swivel bolt. A swivel bolt may be formed as a single piece and/or may be formed using additive manufacturing technology. In embodiments, a swivel bolt may include a fluid passage having a bend with shaped or contoured inner and outer surfaces.