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 6135-00-982-1882
NSN 5985-01-345-4313
NSN 6620-00-189-0967
NSN 5835-01-501-0526
NSN 5965-00-170-5254
NSN 4140-00-003-1936
NSN 5996-01-359-5912
NSN 6220-01-406-5351
NSN 6685-01-288-8408
NSN 5975-00-126-4592
NSN 5915-01-467-0113
NSN 5925-00-487-1502