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 5915-00-035-4462
NSN 6135-00-145-8884
NSN 5996-00-685-9109
NSN 5990-01-642-5748
NSN 2925-00-118-2114
NSN 5895-01-100-1825
NSN 2925-01-601-5050
NSN 5996-01-499-9749
NSN 5930-00-381-6878
NSN 6150-01-400-4211
NSN 6105-01-432-9869
NSN 5945-01-032-6885