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 5855-01-559-9639
NSN 5910-01-341-2218
NSN 5950-01-184-5442
NSN 6685-01-293-5714
NSN 5905-00-912-1564
NSN 5998-01-445-6943
NSN 6240-01-155-2959
NSN 5975-01-296-0124
NSN 6240-01-069-2688
NSN 6685-00-659-7831
NSN 2925-01-463-8856
NSN 5965-01-050-4133