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 5998-01-415-6285
NSN 5855-00-014-5008
NSN 6145-01-072-3352
NSN 6685-01-578-7498
NSN 6135-01-466-3980
NSN 4140-00-146-9795
NSN 6105-00-891-9768
NSN 6105-00-724-2483
NSN 6105-00-982-0630
NSN 6645-01-432-7026
NSN 5905-01-034-2971
NSN 6145-00-286-9588