A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.
Classification: Military equipments not identified by kind
NSN 5975-00-387-6515
NSN 6240-01-091-3735
NSN 6110-01-197-9093
NSN 4140-00-371-2269
NSN 7035-00-946-2642
NSN 5905-00-318-6869
NSN 6145-01-484-2495
NSN 5975-00-050-0981
NSN 2925-00-159-9003
NSN 5965-00-757-3403
NSN 5985-00-008-6754
NSN 6320-01-006-6138