A cylindrical, externally threaded item having a centrally located hole specifically designed to retain by means of either a raised box (shoulder), or counterbore, countersink, or a similar shaped recess, an optical element such as a lens, reticle, cell, and the like, in optical assemblies. It must have drilled holes or slots to facilitate assembly and disassembly. For items which house the optical element(s), and form the internal or central portions of an optical system, see cell, optical element. Excludes ring, externally threaded.
Classification: Military equipments not identified by kind
NSN 5935-00-161-7014
NSN 5996-01-456-0488
NSN 4140-00-215-8593
NSN 6685-01-178-0979
NSN 5905-01-634-0595
NSN 6620-01-090-3803
NSN 6220-00-134-3065
NSN 5999-00-301-4823
NSN 6645-01-163-8002
NSN 5935-01-027-0915
NSN 7035-01-413-2018
NSN 6650-01-556-9696