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 5960-01-632-6576
NSN 5960-00-148-4493
NSN 5960-01-192-7710
NSN 6145-00-197-9010
NSN 5990-00-054-4785
NSN 5920-00-081-9156
NSN 6135-00-973-5632
NSN 6650-01-472-2244
NSN 5960-01-441-7047
NSN 6135-01-205-5965
NSN 5915-01-077-2208
NSN 5910-01-182-1492