Thread series designator: un; thread size: 0.250; thread quantity per inch: 28
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 5920-01-649-3942
NSN 5975-01-383-4766
NSN 5975-00-299-1202
NSN 6650-01-327-5113
NSN 6220-01-373-4016
NSN 6135-01-344-2442
NSN 5935-00-142-4880
NSN 6150-01-347-7837
NSN 6610-01-469-6235
NSN 6610-01-420-1739
NSN 6685-00-296-0392
NSN 5920-01-508-7820