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 4140-01-275-1700
NSN 6610-01-276-7766
NSN 5915-00-057-5804
NSN 6130-01-353-2248
NSN 6650-01-616-0592
NSN 6130-00-481-5993
NSN 4140-01-273-4891
NSN 5950-00-090-3035
NSN 6105-01-430-9736
NSN 5835-00-153-4100
NSN 5835-01-104-1299
NSN 5905-01-566-3694