2815-15-125-4482

4933-12-190-2234 4933121902234 121902234 is 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.

5330-01-190-2234 5330011902234 011902234 is a deformable material which prevents the passage of matter through the joint formed when two faces are joined. it may be metallic or nonmetallic, lubricated or impregnated, solid or hollow cross section. it may be made to any predetermined dimension and shape. excludes flat disks, items made of felt material and items having joints. for round metal and plastic items with an aperture and a solid rectangular cross section, see washer, flat; shim; bearing, washer, thrust; and spacer ring. excludes disk, valve; seal, nonmetallic angle; seal, nonmetallic channel; seal, nonmetallic special shaped section; shielding gasket, electronic; and ring, sealing jar.

5820-00-190-2234 5820001902234 001902234

2815-15-190-2234 2815151902234 151902234 MOTORE MARINO

4130-33-206-0061 4130332060061 332060061 is an item of equipment, whose main elements are an arrangement of tubes within a shell, through which the flow of water and refrigerant is maintained in such a heat transfer relationship that the water is chilled. excludes chilled water unit, bakery.