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 4140-01-458-2743
NSN 6220-01-410-8592
NSN 5985-00-897-7865
NSN 5905-01-399-0239
NSN 6685-01-125-0026
NSN 6150-01-176-0221
NSN 5855-00-879-5849
NSN 4140-01-366-6666
NSN 6150-01-472-2033
NSN 5895-00-169-7617
NSN 6620-01-166-4150
NSN 6145-01-642-1446