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 2925-01-279-6692
NSN 6130-01-525-8269
NSN 5905-01-445-6373
NSN 5985-01-505-0548
NSN 7035-00-997-6212
NSN 5950-01-398-8161
NSN 6685-01-657-7856
NSN 5855-01-534-2428
NSN 5945-01-176-0048
NSN 4140-01-354-5971
NSN 5910-01-318-3520
NSN 6150-01-025-1467