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
NSN 5950-01-557-0106
NSN 6240-01-449-2883
NSN 5925-00-089-6131
NSN 5996-00-644-4662
NSN 5895-01-004-9861
NSN 5835-00-537-7780
NSN 4140-00-058-7109
NSN 5920-01-329-1113
NSN 6620-01-484-6904
NSN 2925-01-550-0177
NSN 6130-01-407-0148