A rectangular or square precision tool having a flat working surface(s) of specific flatness. It is used as a datum plane in connection with various layout, inspection, and calibration operations. It may also be used as a lapping plate, but is not grooved. See also block, lapping; plate, duplex, surface and lapping; and plate, lapping.
NSN 5935-00-445-6444
NSN 6320-01-388-1067
NSN 5915-01-608-2495
NSN 6685-00-957-8509
NSN 6130-00-589-7779
NSN 6620-00-227-6776
NSN 5999-00-456-0603
NSN 5935-01-246-3638
NSN 6105-01-547-0294
NSN 5895-00-288-5878
NSN 6645-01-085-4214
NSN 6135-01-278-9717