Heat treated
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 5910-01-139-1246
NSN 6220-00-205-2040
NSN 5935-00-462-9186
NSN 4140-01-352-1787
NSN 5985-01-058-8999
NSN 5965-00-139-4870
NSN 6650-00-575-7487
NSN 5835-00-257-2852
NSN 5925-01-270-2736
NSN 6610-00-176-5486
NSN 5965-01-063-7894
NSN 5998-01-233-9905