Attachment method, slot
An item specifically designed to be used with a multiscale dial or sector of a measuring device to limit, open or close the observation of the scale (s), or dial (s) desired. it is usually flat and contains one or more observation slots. It may be hinged or otherwise moved by rotary or straight-line motion to expose the scale or scales required for observation.
NSN 6240-01-500-3024
NSN 6150-01-413-4947
NSN 5930-00-006-3171
NSN 5985-00-532-3710
NSN 5990-01-197-6922
NSN 6135-01-431-6801
NSN 5835-01-469-6706
NSN 6685-01-359-2723
NSN 5895-00-899-0334
NSN 5975-01-487-4379
NSN 6145-01-323-8609
NSN 6145-01-497-7583