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: Apparatus & equipment, automatically developing photographic film/paper in rolls, automatically exposing developing film to roll of photographic paper
NSN 6150-00-700-0910
NSN 5895-01-207-0753
NSN 5998-01-254-0816
NSN 5925-01-058-1265
NSN 6240-00-945-0298
NSN 5935-01-418-5354
NSN 6135-00-593-6831
NSN 5920-00-391-6252
NSN 6130-00-229-5530
NSN 5895-00-005-2945
NSN 5905-01-609-3866
NSN 6685-01-168-8893