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 5905-01-127-8450
NSN 5945-00-767-1760
NSN 5925-00-006-3539
NSN 5930-00-962-9514
NSN 5910-01-261-6135
NSN 5925-01-360-8128
NSN 6220-01-091-2470
NSN 5915-00-389-1126
NSN 6110-01-343-6742
NSN 5920-01-115-1739
NSN 5905-00-836-8582
NSN 6110-00-379-9693