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 5915-01-292-6574
NSN 5945-01-397-1306
NSN 6130-01-192-6466
NSN 5920-01-158-2684
NSN 6685-01-593-3972
NSN 6650-01-306-2941
NSN 5910-01-093-7034
NSN 5920-00-878-2753
NSN 6685-00-770-2052
NSN 5996-01-107-5737
NSN 5950-00-557-5270
NSN 6220-00-551-7516