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 5945-01-458-4923
NSN 5925-01-012-6213
NSN 6130-01-440-6527
NSN 5855-00-688-9954
NSN 5965-00-671-4119
NSN 5915-01-132-9123
NSN 5990-01-064-4852
NSN 5935-01-345-9965
NSN 6645-01-570-3215
NSN 5990-00-068-4324
NSN 2925-01-113-6904
NSN 5999-01-085-6713