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 5975-01-586-4019
NSN 6610-01-046-5669
NSN 6645-01-193-1277
NSN 6110-00-610-0555
NSN 5975-01-482-0199
NSN 6650-01-581-7526
NSN 6240-01-556-0650
NSN 5855-01-134-7106
NSN 7035-00-299-7150
NSN 5965-00-226-0209
NSN 5990-01-608-3505
NSN 5895-01-063-7400