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 5950-00-982-6482
NSN 6645-00-724-7668
NSN 6110-00-676-1599
NSN 5975-01-128-3023
NSN 6685-01-033-0267
NSN 5920-01-220-3037
NSN 5996-01-033-6585
NSN 6320-00-841-2279
NSN 7035-00-981-7216
NSN 5935-01-592-9685
NSN 6220-01-480-4000
NSN 5985-00-053-3157