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 4140-01-235-3921
NSN 6240-00-933-5075
NSN 6240-00-083-9092
NSN 6620-00-838-6954
NSN 5930-00-672-5948
NSN 6110-00-949-4977
NSN 6105-01-334-0111
NSN 6240-00-957-5724
NSN 6240-01-529-6624
NSN 5960-00-052-4112
NSN 4140-00-365-2531
NSN 5925-01-385-7855