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 5905-01-366-8121
NSN 6650-00-021-2467
NSN 7035-01-007-1802
NSN 7035-01-330-6768
NSN 6650-00-084-4258
NSN 5905-00-957-2350
NSN 5835-00-378-1429
NSN 4140-01-595-0741
NSN 5945-01-125-2417
NSN 2925-01-511-2667
NSN 6105-00-920-8655
NSN 5999-01-057-9522