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 6110-00-084-5371
NSN 5990-01-463-5400
NSN 6650-00-605-4058
NSN 6220-00-099-9192
NSN 6685-01-336-2780
NSN 6685-01-475-0305
NSN 7035-01-479-0813
NSN 5925-01-053-6519
NSN 5905-01-544-2329
NSN 6145-01-348-8602
NSN 5996-01-456-0488
NSN 6650-01-346-5935