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 2925-01-385-6661
NSN 5945-01-561-7211
NSN 5930-01-254-3644
NSN 5920-00-849-3865
NSN 5905-01-437-1480
NSN 6105-01-102-0009
NSN 5925-00-959-6075
NSN 6220-00-960-7591
NSN 2925-00-118-3373
NSN 6135-00-299-6918
NSN 5835-01-435-4139
NSN 5960-00-188-8648