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 5930-01-481-2993
NSN 7035-00-490-0485
NSN 6610-00-287-6884
NSN 6220-00-070-6062
NSN 6105-00-392-1919
NSN 6220-01-388-2624
NSN 5905-00-332-5542
NSN 5950-01-188-6934
NSN 6240-00-246-7242
NSN 6650-01-442-7893
NSN 6240-01-425-1939
NSN 5930-01-481-4233