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 5990-00-983-7530
NSN 5935-00-983-7113
NSN 6150-01-414-3594
NSN 5960-00-407-1728
NSN 5915-01-537-1155
NSN 5998-01-323-4502
NSN 5930-01-055-4624
NSN 6610-01-555-6654
NSN 5835-01-416-6449
NSN 6240-01-420-5905
NSN 6610-01-633-8931
NSN 7035-01-035-8987