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 5935-00-845-1950
NSN 6150-01-364-1023
NSN 5996-00-236-3206
NSN 5960-01-518-4440
NSN 6150-00-809-9114
NSN 5945-00-420-1273
NSN 5895-01-020-7771
NSN 6610-01-166-4860
NSN 5935-00-625-9655
NSN 6610-01-586-5221
NSN 6610-00-413-5016
NSN 5905-01-210-3500