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 6150-00-158-5620
NSN 5920-01-119-1896
NSN 5930-01-406-4281
NSN 4140-01-542-5199
NSN 5996-00-834-8242
NSN 6105-00-387-3762
NSN 4140-01-232-0537
NSN 6240-00-163-5143
NSN 6685-01-414-3596
NSN 5960-01-167-8796
NSN 6145-01-401-3713
NSN 6610-01-076-4800