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 2925-00-016-9455
NSN 6220-00-620-7563
NSN 5935-01-519-9349
NSN 5975-01-093-7041
NSN 5910-01-562-3401
NSN 6320-00-646-3311
NSN 5960-01-212-8118
NSN 6620-01-474-1890
NSN 5960-01-641-5493
NSN 5920-01-525-3106
NSN 4140-01-522-9932
NSN 5950-01-131-9994