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 6240-01-431-5790
NSN 5985-00-526-3469
NSN 5920-00-008-0579
NSN 7035-01-248-4319
NSN 7035-01-151-0265
NSN 5945-01-411-2822
NSN 6240-01-139-3377
NSN 6685-00-642-0533
NSN 5920-01-425-7496
NSN 6135-01-247-5660
NSN 5930-01-348-0651
NSN 5985-01-053-6830