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 6135-01-113-1507
NSN 6320-01-462-2295
NSN 6220-00-343-0182
NSN 5835-00-106-2120
NSN 4140-00-229-8467
NSN 5920-01-032-6471
NSN 5950-01-092-2740
NSN 5990-00-932-3070
NSN 6150-01-521-0781
NSN 5920-01-417-8751
NSN 5895-01-245-9090
NSN 5835-00-111-3419