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 6145-01-480-8525
NSN 5996-01-288-5955
NSN 5945-01-358-4012
NSN 6220-00-954-4897
NSN 5915-01-432-2491
NSN 5990-00-078-3182
NSN 6150-01-611-9870
NSN 5910-01-615-4964
NSN 5998-01-334-7022
NSN 2925-01-179-7795
NSN 5960-01-292-0027
NSN 5910-00-932-9162