The present disclosure describes apparatuses and methods for separating and installing optical fibers into furcation tubing. A fiber optic furcation assembly can include a fan-out structure. The fan out structure can include a conduit, and the conduit can extend from a first face of the fan-out structure to an opposing second face of the fan-out structure. The fiber optic furcation assembly can also include a furcation tube. The furcation tube can be positioned within the conduit, and the furcation tube can extend to a terminal end beyond the second face of the fan-out structure. The fiber optic furcation assembly can also include a fiber pull. The fiber pull can be positioned within the furcation tube, and the fiber pull can protrude in a first portion beyond the first face of the fan-out structure and the fiber pull can protrude in a second portion beyond the terminal end of the furcation tube, and the fiber optic furcation assembly can also include an attachment structure. The attachment structure can be fixed to the first portion of the fiber pull, and the attachment structure can receive and couple with an optical fiber. The fiber pull can include a diameter and the attachment structure can include a diameter. The diameter of the fiber pull and the diameter of the attachment structure can be less than a diameter of the furcation tube.