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 5996-00-146-3726
NSN 6685-00-013-9969
NSN 6145-01-076-3699
NSN 6135-01-132-6310
NSN 6110-01-054-1234
NSN 6645-01-301-3066
NSN 6130-01-382-6871
NSN 5920-01-086-7219
NSN 6150-00-187-1368
NSN 5895-00-736-0495
NSN 6150-01-106-3646
NSN 5920-00-204-8125