Fiber Optic Connector Housings provide the mechanism for snapping into a mating sleeve (adapter) whether it is board mount, free hanging, or panel mount. The housings are to be used with F1 contacts, F2 contacts, HMUA-F3 ferrules, HMUB sleeve holder, HSC ferrules, LC connectors, LC plugs, Lightray MPX connectors, MPO plugs, MPO receptacles, MU ferrules, and SC connectors and plugs.