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 5935-00-274-5750
NSN 5835-01-399-5820
NSN 7035-01-560-1065
NSN 6130-01-371-2417
NSN 6645-00-025-4771
NSN 5999-01-304-8176
NSN 5975-01-401-5355
NSN 5920-01-180-8307
NSN 5895-01-080-1657
NSN 6320-01-274-2501
NSN 6105-01-188-1524
NSN 5950-01-499-8251