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 6645-01-434-2648
NSN 6650-01-640-9370
NSN 6145-00-517-6666
NSN 2925-00-468-5273
NSN 6105-01-150-4986
NSN 6105-01-375-7790
NSN 5930-01-492-5114
NSN 5996-01-444-1488
NSN 7035-00-465-3298
NSN 5965-01-026-1752
NSN 6620-01-631-8889
NSN 4140-01-445-5945