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 5985-01-206-9909
NSN 5835-01-480-3484
NSN 6650-01-528-8230
NSN 6145-01-422-1830
NSN 6320-01-357-3222
NSN 5975-00-383-1384
NSN 5965-01-050-8447
NSN 5975-01-089-3711
NSN 5905-01-446-8396
NSN 5920-00-930-1212
NSN 6645-00-152-1702
NSN 6685-01-534-3372