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 4140-01-191-6457
NSN 6220-01-200-3410
NSN 6620-01-606-8964
NSN 5910-00-795-9655
NSN 5925-01-226-4961
NSN 6650-01-407-4653
NSN 5990-01-432-9844
NSN 6150-01-022-1414
NSN 5960-01-553-4557
NSN 6135-01-485-4512
NSN 6130-00-531-3326
NSN 6240-00-518-3541