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 6645-01-567-8282
NSN 5895-00-905-8544
NSN 4140-00-547-8918
NSN 5996-00-223-9878
NSN 6685-01-376-9166
NSN 5960-00-170-6447
NSN 6220-01-030-2697
NSN 6135-01-558-4194
NSN 6110-01-478-3509
NSN 6135-00-412-1687
NSN 6685-01-530-7681
NSN 6620-00-321-3630