Magnesium fluoride anti-reflection coating both surfaces per mil-c-675c; fragility factor: very delicate
A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also window, observation; and dial, scale.
Classification: Clock or watch glass; glasses for noncorrective spectagles not optically worked; hollow glass spheres and their segments for the mnfctr ofsuch glasses
NSN 5835-01-024-9249
NSN 5985-01-281-7698
NSN 5965-01-310-0634
NSN 6150-00-427-4477
NSN 5999-00-405-2501
NSN 6110-00-830-7639
NSN 5985-01-528-7050
NSN 6645-01-322-8897
NSN 5895-00-328-9314
NSN 5998-00-823-8488
NSN 5965-01-209-2838
NSN 5920-01-129-1473