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 5855-01-218-3735
NSN 6145-00-358-6700
NSN 6240-00-764-1580
NSN 2925-01-157-9204
NSN 5975-01-035-7704
NSN 5975-00-753-9409
NSN 6645-00-497-3495
NSN 6145-00-427-7201
NSN 5910-00-725-8986
NSN 5915-01-510-9763
NSN 6685-01-384-3900
NSN 6610-01-272-9691