A fiber optic apparatus, comprising: at least one fiber body retained in a retainer assembly (12, 12', 112, 112', 212, 312, 412) having at least one retainer (16, 116, 226, 316, 316') configured to releasably retain the at least one fiber body, wherein the fiber body is a body or a device including components that furcate, separate, ensleeve, or in any manner combine or un-combine optical fibers with respect to other optical fibers, fiber optic cables, coverings or jackets, and/or clamp or retain one or more optical fibers or fiber optic cables, wherein the at least one retainer (16, 116, 226, 316, 316') comprises a channel (18, 118, 120, 228, 318, 318', 416) formed by end walls (20, 122, 126, 230) and side walls (22, 124, 128, 232), wherein the end walls (20, 122, 126, 230) are divided into first and second segments by a center wall which intersects the end walls (20, 122, 126, 230), and an attachment feature (14, 14', 114, 114', 220, 222, 314, 314', 418) configured to removably attach the retainer assembly (12, 12', 112, 112', 212, 312, 412), characterized in that the at least one optical fiber body comprises mounting bosses, the at least one retainer (16, 116, 226, 316, 316') is configured to releasably retain the at least one fiber body via the mounting bosses on the fiber body, and wherein the channel (18, 118, 120, 228, 318, 318', 416) is configured to receive at least one of the mounting bosses of the at least one fiber body, wherein the mounting bosses are inserted in the channel (18, 118, 120, 228, 318, 318', 416) with one mounting boss on one side of the center wall and the other mounting boss on the other side of the center wall, and wherein the center wall prevents the fiber body from rotating. at least one fiber body retained in a retainer assembly (12, 12', 112, 112', 212, 312, 412) having at least one retainer (16, 116, 226, 316, 316') configured to releasably retain the at least one fiber body, wherein the fiber body is a body or a device including components that furcate, separate, ensleeve, or in any manner combine or un-combine optical fibers with respect to other optical fibers, fiber optic cables, coverings or jackets, and/or clamp or retain one or more optical fibers or fiber optic cables, wherein the at least one retainer (16, 116, 226, 316, 316') comprises a channel (18, 118, 120, 228, 318, 318', 416) formed by end walls (20, 122, 126, 230) and side walls (22, 124, 128, 232), wherein the end walls (20, 122, 126, 230) are divided into first and second segments by a center wall which intersects the end walls (20, 122, 126, 230), and wherein the fiber body is a body or a device including components that furcate, separate, ensleeve, or in any manner combine or un-combine optical fibers with respect to other optical fibers, fiber optic cables, coverings or jackets, and/or clamp or retain one or more optical fibers or fiber optic cables, wherein the at least one retainer (16, 116, 226, 316, 316') comprises a channel (18, 118, 120, 228, 318, 318', 416) formed by end walls (20, 122, 126, 230) and side walls (22, 124, 128, 232), wherein the end walls (20, 122, 126, 230) are divided into first and second segments by a center wall which intersects the end walls (20, 122, 126, 230), and an attachment feature (14, 14', 114, 114', 220, 222, 314, 314', 418) configured to removably attach the retainer assembly (12, 12', 112, 112', 212, 312, 412), characterized in that the at least one optical fiber body comprises mounting bosses, the at least one retainer (16, 116, 226, 316, 316') is configured to releasably retain the at least one fiber body via the mounting bosses on the fiber body, and wherein the channel (18, 118, 120, 228, 318, 318', 416) is configured to receive at least one of the mounting bosses of the at least one fiber body, wherein the mounting bosses are inserted in the channel (18, 118, 120, 228, 318, 318', 416) with one mounting boss on one side of the center wall and the other mounting boss on the other side of the center wall, and wherein the center wall prevents the fiber body from rotating.