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 4140-00-474-9973
NSN 4140-01-475-4270
NSN 6145-01-321-9682
NSN 5975-00-570-9598
NSN 5975-01-189-4660
NSN 6135-01-436-7733
NSN 6645-01-361-8319
NSN 6110-00-964-3514
NSN 6610-01-010-3831
NSN 6105-00-089-2578
NSN 6685-00-528-5175
NSN 6135-01-142-2417