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 5925-01-246-4520
NSN 5920-01-362-5183
NSN 6110-01-147-6581
NSN 5999-01-038-6043
NSN 5915-01-185-0541
NSN 6220-00-553-4048
NSN 5975-01-416-2835
NSN 5855-01-288-2271
NSN 6105-01-559-9353
NSN 5945-00-308-5426
NSN 5950-01-084-7800
NSN 6150-01-251-2544